Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: author="Puystjens, Roland" or (type exact bookEditor and editor="Puystjens, Roland") Add to list Journal Article A2 The group inverse of a companion matrix Roland Puystjens and RE Hartwig (1997) LINEAR & MULTILINEAR ALGEBRA. 43(1-3). p.137-150 Add to list PhD Thesis Determinanten voor matrices over ringen / Roland Puystjens. Roland Puystjens (1973)