[1] I. Chajda: Partitions, coverings and blocks of compatible relations. Glasnik Mat. Ser. III 14 (34) (1979), 21-26. MR 0544058 | Zbl 0402.08001

[2] I. Chajda J. Niederle, B. Zelinka: On existence conditions for compatible tolerances. Czech. Math. J. 26 (1976), 301-311. MR 0401561

[3] I. Chajda, M. Zelinka: Tolerance relations on lattices. Časop. Pěstov. Mat. 99 (1974), 394-399. MR 0360380

[4] I. Chajda, B. Zelinka: Tolerances and convexity. Czech. Math. J. 29 (1979), 584-587. MR 0548221 | Zbl 0407.06002

[5] G. Czédli: Factor lattices by tolerances. Acta Sci. Math. 44 (1982), 35-42, MR 0660510

[6] G. Czédli, L. Klukovits: A note on tolerances of idempotent algebras. Glasnik Mat. Ser. III 18 (38), 35-38. MR 0710382

[7] E. Fried, G. Grätzer: Notes on tolerance relations of lattices: On a conjecture of R. McKenzie. Manuscript (1987), 1-12. To appear in Acta Sci. Math. (Szeged). MR 1096802

[8] E. Fried, G. Grätzer: Generalized congruences and products of lattice varieties. Manuscript (1987), 1 -23. To appear in Acta Sci. Math. (Szeged). MR 1073416

[9] G. Grätzer: General Lattice Theory. Academic Press, New York, N. Y.; Birkhäuser Verlag, Basel; Akademie Verlag, Berlin, 1978. MR 0509213

[10] G. Grätzer: Universal Algebra. Second Edition, Springer Verlag, New York, Heidelberg, Berlin, 1968. MR 0538623

[11] G. Grätzer, G. H. Wenzel: Notes on Tolerance Relations of Lattices. Manuskripte Nr. 66, Fakultät für Mathematik und Informatik der Universität Mannheim (1987), 1-20. To appear in Acta Sci. Math. (Szeged). MR 1096802

[12] M. Kindermann: Über die Äquivalenz von Ordnungspolynomvollständigkeit und Toleranzeinfachheit endlicher Verbände. in "Contributions to General Algebra (Proceedings of the Klagenfurt Conference 1978)," 1979, pp. 145-149. MR 0537415

[13] I. Rosenberg, D. Schweigert: Compatible Orderings and Tolerances of Lattices. Preprint No. 70, Univ. Kaiserlautern (1983), 1-44. MR 0779849

[14] B. Zelinka: Tolerances in algebraic structures. Czech. Math. J. 20 (1970), 179-183. MR 0260653