16554 Stephan Foldes/Gerasimos Meletiou: Semilattices distributive over a max operation. Rutcor Res. Rep. 8-98 (1998), 8p. 17675 Jürgen Herzog//Takayuki Hibi/Xin-xian Zheng: The monomial ideal of a finite meet-semilattice. Internet 2004, 17p.