Bandelt, H. H. "Tolerance Relations on Lattices." Bull. Austral. Math. Soc.23, 367-381, 1981.Birkhoff, G. 格理论,第 3 版 普罗维登斯,罗德岛州:美国数学会,1967 年。Chajda, I. 和 Zelinka, B. "Tolerances and Convexity." Czech. Math. J.29, 584-587, 1979.Chajda, I. 和 Zelinka, B. "A Characterization of Tolerance-Distributive Tree Semilattices." Czech. Math. J.37, 175-180, 1987.Grätzer, G. 一般格理论,第 2 版 波士顿,马萨诸塞州:Birkhäuser,1998 年。Hobby, D. 和 McKenzie, R. 有限代数的结构。 普罗维登斯,罗德岛州:美国数学会,1988 年。Insall, M. "Some Finiteness Conditions in Lattices Using Nonstandard Proof Methods." J. Austral. Math. Soc.53, 266-280, 1992.Schweigert, D. "Central Relations on Lattices." J. Austral. Math. Soc.37, 213-219, 1988.Schweigert, D. 和 Szymanska, M. "On Central Relations of Complete Lattices." Czech. Math. J.37, 70-74, 1987.