1. [B]G. Birkhoff,Lattice Theory 3rd ed., A.M.S. Colloq. Publ. v. 25 Providence, (1967).
2. [C]P. M. Cohn,Universal Algebra, Harper and Row, New York (1965).
3. [FT]I. Fleischer andT. Traynor,Equivalence of group valued measures on an abstract lattice, to appear in Bull. Acad. Pol. Sci.
4. [G]L. Geissinger,Valuations on distributive lattices I, Arch. Math.24 (1973), 230–239.
5. [H]J. Hashimoto,On a lattice with valuation, Proc. AMS3 (1952) 1–2.