On ternary transversal matroids
Binary transversal matroids were characterized by \textit{J. de Sousa} and \textit{D. J. A. Welsh} [J. Math. Anal. Appl. 40, 55-59 (1972; Zbl 0197.288)]. Answering a question of Ingleton, the author characterizes ternary transversal matroids via forbidden series minors.
scientific article; zbMATH DE number 4012635