1993

Distributive laws for concept lattices.
Algebra Universalis, 30:538-580, 1993.
Marcel Erné.
[doi]  [Kurzfassung]  [BibTeX] 

1991

On Complete Congruence Lattices of Complete Lattices.
Trans. Amer. Math. Soc., 327(1):385-405, 1991.
George Grätzer und Henry Lakser.
[BibTeX] 

1964

On the non-existence of free complete Boolean algebras.
Fundamentae Mathematica, 54:45-66, 1964.
A. W. Hales.
[doi]  [BibTeX]