Sergey Kitaev. The sigma-sequence and counting occurrences of some patterns, subsequences and subwords. Australasian J. Combinatorics, 29:187-200, 2004. [doi]
@article{Kitaev04,
title = {The sigma-sequence and counting occurrences of some patterns, subsequences and subwords},
author = {Sergey Kitaev},
year = {2004},
url = {http://ajc.maths.uq.edu.au/pdf/29/ajc_v29_p187.pdf},
researchr = {https://researchr.org/publication/Kitaev04},
cites = {0},
citedby = {0},
journal = {Australasian J. Combinatorics},
volume = {29},
pages = {187-200},
}