Discrete MathematicsVolume 284, Issues 1–3, 6 July 2004, Pages vii-viiiContentsAuthor links open overlay panelShow moreShareCitehttps://doi.org/10.1016/S0012-365X(04)00254-7Get rights and contentUnder an Elsevier user licenseopen archivePrevious article in issueNext article in issueRecommended articlesCited by (0)Copyright © 2004 Published by Elsevier B.V. All rights reserved.