Blocking Wythoff Nim. Larsson, Urban — 2011 The Electronic Journal of Combinatorics [electronic only]
Permutations of the natural numbers with prescribed difference multisets. Hegarty, Peter; Larsson, Urban — 2006 Integers
The structure of maximum subsets of { 1 , ⋯ , n } with no solutions to a + b = k c . Baltz, Andreas; Hegarty, Peter; Knape, Jonas; Larsson, Urban; Schoen, Tomasz — 2005 The Electronic Journal of Combinatorics [electronic only]