On Group-Divisible Designs with Block Size Four and Group-Type g u m 1 G. GeR. S. Rees OriginalPaper Pages: 5 - 24
On Orthogonal Double Covers of Graphs Hans-Dietrich O. F. GronauMartin GrüttmüllerVolker Leck OriginalPaper Pages: 49 - 91
Modular Arithmetic on Elements of Small Norm in Quadratic Fields M. J. Jacobson Jr.H. C. Williams OriginalPaper Pages: 93 - 110
A New Bound on the Number of Designs with Classical Affine Parameters Clement LamVladimir D. Tonchev OriginalPaper Pages: 111 - 117
Partitioning Sets of Triples into Small Planes Rudolf MathonAnne Penfold Street OriginalPaper Pages: 119 - 130
Enumeration of 2-(9, 3, λ) Designs and Their Resolutions Patric R. J. ÖstergårdPetteri Kaski OriginalPaper Pages: 131 - 137
Existence of Perfect 4-Deletion-Correcting Codes with Length Six Nabil ShalabyJianmin WangJianxing Yin OriginalPaper Pages: 145 - 156