Sergey Kitaev, Jeffrey B. Remmel. Classifying Descents According to Equivalence mod k. Electr. J. Comb., 13(1), 2006. [doi]
@article{KitaevR06, title = {Classifying Descents According to Equivalence mod k}, author = {Sergey Kitaev and Jeffrey B. Remmel}, year = {2006}, url = {http://www.combinatorics.org/Volume_13/Abstracts/v13i1r64.html}, researchr = {https://researchr.org/publication/KitaevR06}, cites = {0}, citedby = {0}, journal = {Electr. J. Comb.}, volume = {13}, number = {1}, }