Charles J. Mifsud. Algorithm 154: combination in lexicographical order. Communications of the ACM, 6(3):103, 1963. [doi]
@article{Mifsud63b,
title = {Algorithm 154: combination in lexicographical order},
author = {Charles J. Mifsud},
year = {1963},
doi = {10.1145/366274.366309},
url = {http://doi.acm.org/10.1145/366274.366309},
researchr = {https://researchr.org/publication/Mifsud63b},
cites = {0},
citedby = {0},
journal = {Communications of the ACM},
volume = {6},
number = {3},
pages = {103},
}