Robinson, R. W. Counting unlabeled acyclic digraphs. (English) Zbl 0376.05031 Comb. Math. V, Proc. 5th Aust. Conf., Melbourne 1976, Lect. Notes Math. 622, 28-43 (1977). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 24 Documents MSC: 05C30 Enumeration in graph theory 05C20 Directed graphs (digraphs), tournaments PDF BibTeX XML