| Publication | Date of Publication | Type |
|---|
| https://portal.mardi4nfdi.de/entity/Q2816124 | 2016-07-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2936653 | 2015-01-06 | Paper |
| Edge contraction and edge removal on iterated clique graphs | 2014-04-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3058988 | 2010-12-08 | Paper |
| On expansive graphs | 2009-03-04 | Paper |
| Circulant tournaments of prime order are tight | 2009-01-28 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3514354 | 2008-07-21 | Paper |
| On a heterochromatic number for hypercubes | 2008-07-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3439703 | 2007-05-29 | Paper |
| On \(\frac 12\)-homogeneous continua | 2006-09-13 | Paper |
| Graph relations, clique divergence and surface triangulations | 2006-03-24 | Paper |
| Compact compatible topologies for graphs with small cycles | 2005-12-07 | Paper |
| An anti-Ramsey theorem on cycles | 2005-11-24 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5463597 | 2005-08-04 | Paper |
| A note on convex decompositions of a set of points in the plane | 2004-12-13 | Paper |
| On the heterochromatic number of circulant digraphs | 2004-10-27 | Paper |
| A note on minimally 3-connected graphs | 2004-10-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4810372 | 2004-09-06 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4810373 | 2004-09-06 | Paper |
| The clique operator on cographs and serial graphs | 2004-08-06 | Paper |
| A hierarchy of self-clique graphs | 2004-08-06 | Paper |
| Dismantlings and iterated clique graphs | 2004-08-06 | Paper |
| Clique divergent clockwork graphs and partial orders | 2004-08-06 | Paper |
| Dendroids and preorders | 2004-05-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4454260 | 2004-03-08 | Paper |
| A linear heterochromatic number of graphs | 2004-03-04 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4430844 | 2003-10-13 | Paper |
| On a tree graph defined by a set of cycles | 2003-09-25 | Paper |
| An anti-Ramsey theorem | 2003-05-18 | Paper |
| Whitney triangulations, local girth and iterated clique graphs | 2002-12-02 | Paper |
| On clique divergent graphs with linear growth | 2002-05-15 | Paper |
| Dichromatic number, circulant tournaments and Zykov sums of digraphs | 2002-03-24 | Paper |
| Order Invariants and the Fixed Point Property | 2002-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2741454 | 2001-10-24 | Paper |
| A class of tight circulant tournaments | 2001-10-03 | Paper |
| Locally \(C_6\) graphs are clique divergent | 2001-05-28 | Paper |
| Shore points and noncut points in dendroids | 2000-09-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4953557 | 2000-05-09 | Paper |
| Tightness problems in the plane | 2000-02-16 | Paper |
| The acyclic disconnection of a digraph | 2000-01-09 | Paper |
| Two order invariants related to the fixed point property | 1999-09-07 | Paper |
| Clique divergent graphs with unbounded sequence of diameters | 1999-08-09 | Paper |
| A note on covering the edges of a graph with bonds | 1999-08-09 | Paper |
| New classes of critical kernel-imperfect digraphs | 1999-06-08 | Paper |
| Compact compatible topologies for posets and graphs | 1998-12-02 | Paper |
| A family of clique divergent graphs with linear growth | 1998-02-08 | Paper |
| A combinatorial property of convex sets | 1997-09-23 | Paper |
| Vertex critical 4-dichromatic circulant tournaments | 1997-08-10 | Paper |
| Fixed points of posets and clique graphs | 1997-06-26 | Paper |
| Euler tours and a game with dominoes | 1997-06-09 | Paper |
| KP-digraphs and CKI-digraphs satisfying the k-Meyniel's condition | 1997-05-04 | Paper |
| Compatible connectedness in graphs and topological spaces | 1996-07-08 | Paper |
| Tight and untight triangulations of surfaces by complete graphs | 1995-07-02 | Paper |
| New extensions of kernel perfect digraphs to kernel imperfect critical digraphs | 1995-02-01 | Paper |
| A short proof of a theorem of Reid and Parker on tournaments | 1995-02-01 | Paper |
| The 3 and 4-dichromatic tournaments of minimum order | 1995-02-01 | Paper |
| Shore Points and Dendrites | 1993-09-01 | Paper |
| Digital Jordan curves---a graph-theoretical approach to a topological theorem | 1993-04-01 | Paper |
| On the minimum size of tight hypergraphs | 1992-10-05 | Paper |
| Extending kernel perfect digraphs to kernel perfect critical digraphs | 1992-06-28 | Paper |
| Spanning trees with bounded degrees | 1992-06-27 | Paper |
| Orientations of graphs in kernel theory | 1991-01-01 | Paper |
| A combinatorial result on points and circles on the plane | 1988-01-01 | Paper |
| On multiplicative graphs and the product conjecture | 1988-01-01 | Paper |
| When is a LOTS densely orderable? | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3484869 | 1988-01-01 | Paper |
| On kernel-perfect critical digraphs | 1986-01-01 | Paper |
| Uniquely colourable m-dichromatic oriented graphs | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3753098 | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4722817 | 1986-01-01 | Paper |
| On kernels and semikernels of digraphs | 1984-01-01 | Paper |
| Vertex critical r-dichromatic tournaments | 1984-01-01 | Paper |
| A variation of Menger's theorem for long paths | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3693540 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3689215 | 1983-01-01 | Paper |
| The dichromatic number of a digraph | 1982-01-01 | Paper |
| Is Every Go-Topology a Join of Two Orderable Topologies? | 1982-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3037481 | 1981-01-01 | Paper |
| The Epireflective Hull of the Category of T 1 Dispersed Spaces | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3938869 | 1979-01-01 | Paper |
| Mengerian theorems for paths of bounded length | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4200112 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4103565 | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4063185 | 1974-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4094896 | 1972-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4774066 | 1972-01-01 | Paper |
