Generating functions for Wilf equivalence under generalized factor order. Langley, Thomas; Liese, Jeffrey; Remmel, Jeffrey — 2011 Journal of Integer Sequences [electronic only]
q -counting descent pairs with prescribed tops and bottoms. Hall, John; Liese, Jeffrey; Remmel, Jeffrey B. — 2009 The Electronic Journal of Combinatorics [electronic only]
Rationality, irrationality, and Wilf equivalence in generalized factor order. Kitaev, Sergey; Liese, Jeffrey; Remmel, Jeffrey; Sagan, Bruce E. — 2009 The Electronic Journal of Combinatorics [electronic only]