Monge sequences and a simple assignment algorithm. - Ulrich Derigs; Oskar Goecke; Rainer Schrader (Discret. Appl. Math., 1986)

Eliminationsprozesse in der kombinatorischen Optimierung, ein Beitrag zur Greedoidtheorie. - Oskar Goecke (1986)

A greedy algorithm for hereditary set systems and a generalization of the Rado-Edmonds characterization of matroids. - Oskar Goecke (Discret. Appl. Math., 1988)

Minor characterization of undirected branching greedoids - a short proof. - Oskar Goecke; Rainer Schrader (Discret. Math., 1990)