Discrete MathematicsVolume 133, Issues 1–3, 15 October 1994, Pages 285-289NoteConcerning difference families with block size fourAuthor links open overlay panelPaul L. Check, Charles J. ColbournShow moreShareCitehttps://doi.org/10.1016/0012-365X(94)90035-3Get rights and contentUnder an Elsevier user licenseopen archiveAbstractA direct construction is given for a cyclic difference family of (4pn,4,1)-design for all p≡13 (mod24) and n⩾0. This corrects in part a construction due to Mathon for prime orders, and extends the construction to prime powers.Previous article in issueNext article in issueRecommended articlesCited by (0)Copyright © 1994 Published by Elsevier B.V.