Article (erne1993distributive)
Erné, M.
Distributive laws for concept lattices
Algebra Universalis, Birkhäuser Basel, 1993, 30, 538-580

Article (GratzerLasker)
Grätzer, G. & Lakser, H.
On Complete Congruence Lattices of Complete Lattices
Trans. Amer. Math. Soc., 1991, 327, 385-405

Article (hales1964nonexistence)
Hales, A. W.
On the non-existence of free complete Boolean algebras
Fundamentae Mathematica, 1964, 54, 45-66