A direct decomposition of 3-connected planar graphs. Bodirsky, Manuel; Gröpl, Clemens; Johannsen, Daniel; Kang, Mihyun — 2005 Séminaire Lotharingien de Combinatoire [electronic only]
Counting defective parking functions. Cameron, Peter J.; Johannsen, Daniel; Prellberg, Thomas; Schweitzer, Pascal — 2008 The Electronic Journal of Combinatorics [electronic only]