Sergey Kitaev, Jeffrey Liese, Jeffrey B. Remmel, Bruce E. Sagan. Rationality, Irrationality, and Wilf Equivalence in Generalized Factor Order. Electr. J. Comb., 16(2), 2009. [doi]
@article{KitaevLRS09,
title = {Rationality, Irrationality, and Wilf Equivalence in Generalized Factor Order},
author = {Sergey Kitaev and Jeffrey Liese and Jeffrey B. Remmel and Bruce E. Sagan},
year = {2009},
url = {http://www.combinatorics.org/Volume_16/Abstracts/v16i2r22.html},
researchr = {https://researchr.org/publication/KitaevLRS09},
cites = {0},
citedby = {0},
journal = {Electr. J. Comb.},
volume = {16},
number = {2},
}