Shorter Notes: The Center of a Complete Relatively Complemented Lattice is a Complete Sublattice
Melvin F. Janowitz · Proceedings of the American Mathematical Society · 1967
M. F. Janowitz, Shorter Notes: The Center of a Complete Relatively Complemented Lattice is a Complete Sublattice, Proceedings of the American Mathematical Society, Vol. 18, No. 1 (Feb., 1967), pp. 189-190