Decomposition of the lattice of pseudovarieties of finite semigroups induced by bands Norman R. ReillyShuhua Zhang Pages: 217 - 239
Constructive insertion theorems and extension theorems on extremally disconnected frames Li Yong-mingLi Zhi-hui Pages: 271 - 281
A characterization of completeness for trellises S. Parameshwara BhattaH. Shashirekha Pages: 305 - 308
Quasi-rings and congruences in the theory of orthomodular algebras Peter BurmeisterRichard HolzerMaciej Mączyński Pages: 333 - 369