Finite four-generated simple lattices contain all finite lattices

Werner Poguntke, Ivan Rival
1976 Proceedings of the American Mathematical Society  
Every finite lattice is embeddable in a finite, four-generated, simple lattice.
doi:10.1090/s0002-9939-1976-0392717-9 fatcat:5x4su2dwjbafdjm2nzzyizcn7a