1. Birkhoff, Garrett: Lattice Theory, Revised edition. Amer. Math. Soc. Colloquium Publications 25, New York 1948.
2. ?? A new interval topology for dually directed sets. Rev. Mat. Fis. Teor. Tucuman14, 325?331 (1962).
3. Bourbaki, N.: Elements de Mathematique, Livre III, Topologie Générale. Paris: Herrmann 1942, 1948.
4. Frink, Orrin: Topology in lattices. Trans. Am. Math. Soc.51, 569?582 (1942).
5. ?? Ideals in partially ordered sets. Am. Math. Monthly61, 223?234 (1954).