Journal of Combinatorial Theory, Series AVolume 47, Issue 1, January 1988, Pages 1-5In memoriamHerbert J. Ryser 1923–1985Author links open overlay panelShow moreShareCitehttps://doi.org/10.1016/0097-3165(88)90038-6Under an Elsevier user licenseopen archivePrevious article in issueNext article in issueRecommended articlesCited by (0)Copyright © 1988 Published by Elsevier Inc. All rights reserved.