Blaisdell, E., A. Gyárfás, R. A. Krueger, and R. Wdowinski. “Partitioning the Power Set of $[n]$ into $C_k$-Free Parts”. The Electronic Journal of Combinatorics, Vol. 26, no. 3, Aug. 2019, p. P3.38, doi:10.37236/8385.