[1] Chajda I.: Lattices of compatible relations. Arch. Math. (Brno) 13 (1977), 89-96. MR 0463081 | Zbl 0372.08002

[2] Chajda I., Zelinka В.: Lattices of tolerances. Čas. pěst. mat. 102 (1911), 10-24.� � � � � �' MR 0450152

[3] Pondělíček В.: Atomicity of tolerance lattices of commutative semigroups. Czech. Math. J. 33 (108) (1983), 485-498. MR 0718931

[4] Clifford A. H., Preston G. В.: The algebraic theory of semigroups. Amer. Math. Soc., Providence, R. I. Vol I(1961); Vol. II (1967). Zbl 0111.03403

[5] Zelinka В.: Tolerance in algebraic structures II. Czech. Math. J. 25 (100) (1975), 175-178. MR 0457323 | Zbl 0316.08001

[6] Ore O.: Structure and group theory II. Duke Math. J. 4 (1938), 247-269. DOI 10.1215/S0012-7094-38-00419-3 | MR 1546048

[7] Nieminen J.: Tolerance relations on join-semilattices. Glasnik Mat. (Zagreb), 12 (1977), 243-246. MR 0551488 | Zbl 0376.06011

[8] Dean R. A., Oehmke R. H.: Idempotent semigroups with distributive right congruence lattice. Pacific J. Math. 14 (1964), 1187-1209. DOI 10.2140/pjm.1964.14.1187 | MR 0172939

[9] Papert D.: Congruence relations in semilattices. J. London Math. Soc. 39 (1964), 723 - 729. DOI 10.1112/jlms/s1-39.1.723 | MR 0166123

[10] Mitsch H.: Semigroups and their lattice of congruences. Semigroup Forum 26 (1983), 1 - 63. DOI 10.1007/BF02572819 | MR 0685115 | Zbl 0513.20047