Miklós Bóna. Permutations avoiding certain patterns: The case of length 4 and some generalizations. Discrete Mathematics, 175(1-3):55-67, 1997. [doi]
@article{Bona97,
title = {Permutations avoiding certain patterns: The case of length 4 and some generalizations},
author = {Miklós Bóna},
year = {1997},
doi = {10.1016/S0012-365X(96)00140-9},
url = {http://dx.doi.org/10.1016/S0012-365X(96)00140-9},
researchr = {https://researchr.org/publication/Bona97},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {175},
number = {1-3},
pages = {55-67},
}