scientific article
From MaRDI portal
Publication:3676365
zbMath0563.20055MaRDI QIDQ3676365
Publication date: 1984
Full work available at URL: https://eudml.org/doc/17350
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Enumeration in graph theory (05C30) Directed graphs (digraphs), tournaments (05C20) Groupoids (i.e. small categories in which all morphisms are isomorphisms) (20L05) Other generalizations of groups (20N99)