Ryan Siders. Monotone Subsequences in Any Dimension. Journal of Combinatorial Theory, Series A, 85(2):243-253, 1999. [doi]
@article{Siders99,
title = {Monotone Subsequences in Any Dimension},
author = {Ryan Siders},
year = {1999},
doi = {10.1006/jcta.1998.2907},
url = {http://dx.doi.org/10.1006/jcta.1998.2907},
researchr = {https://researchr.org/publication/Siders99},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {85},
number = {2},
pages = {243-253},
}