Don Rawlings. The r-Major Index. Journal of Combinatorial Theory, Series A, 31(2):175-183, 1981.
@article{Rawlings81,
title = {The r-Major Index},
author = {Don Rawlings},
year = {1981},
researchr = {https://researchr.org/publication/Rawlings81},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {31},
number = {2},
pages = {175-183},
}