Erik Holmes, Paul Plummer, Jeremy Siegert, and Zach Teitler. Maximum Waring ranks of monomials and sums of coprime monomials. Comm. Alg. 44 (2016), no. 10, 4212-4219
arXiv:
https://arxiv.org/abs/1309.7834
doi:
10.1080/00927872.2015.1087534