Papers on Difference Sets
On cyclic difference sets, Len Baumert and Dan
Gordon, 2003.
This paper gives a survey of results for cyclic difference sets, and
lists open parameters with k<300.
The Prime Power Conjecture is True for n <
2,000,000, Dan Gordon,
Electronic Journal of Mathematics, 1 (1994), Paper R6.
Some Restrictions on Orders of Abelian Planar
Difference Sets
Journal of Combinatorial Mathematics and Combinatorial Computing, 29
(1999), pp. 241-246.
This paper gives new numbers which cannot divide the order of an
abelian planar difference set.