@article{b8975df6d4de4a5a940018a5c2c22fef,
title = "Modified group divisible designs with block size four",
abstract = "The existence of modified group divisible designs with block size four is settled with a handful of possible exceptions.",
author = "Ling, {Alan C.H.} and Colbourn, {Charles J.}",
note = "Funding Information: Thanks to Ron Mullin and two anonymous referees for useful suggestions, and to Ahmed Assaf for the preprint of [4]. The research of the rst author was sponsored by NSERC postgraduate scholarship, while he was a doctoral student at the University of Waterloo. The research of the second author was undertaken at the Department of Computer Science, University of Auckland, whose hospitality is gratefully acknowledged.",
year = "2000",
month = may,
day = "28",
doi = "10.1016/S0012-365X(99)00342-8",
language = "English (US)",
volume = "219",
pages = "207--221",
journal = "Discrete Mathematics",
issn = "0012-365X",
publisher = "Elsevier",
number = "1-3",
}