Forbidden configurations: exact bounds determined by critical substructures. Anstee, R.P., Karp, S.N. (2010) The Electronic Journal of Combinatorics [electronic only]
Frankl-Füredi type inequalities for polynomial semi-lattices. Jin, Qian, Ray-Chaudhuri, Dijen K. (1997) The Electronic Journal of Combinatorics [electronic only]