1. Arens, R.F., Kaplansky, I.: Topological representation of algebras. Trans. Am. Math. Soc. 63, 457–481 (1948)
2. Burris, S., Sankappanavar, H.P.: A Course in Universal Algebra. Millennium Edition, Internet version, http://www.math.uwaterloo.ca/~snburris/htdocs/ualg.html
3. Lecture Notes in Physics;P. Bush,1991
4. Dvurečenskij, A.: Pseudo MV-algebras are intervals in ℓ-groups. J. Aust. Math. Soc. Ser. 72, 427–445 (2002)
5. Dvurečenskij, A., Holland, W.C.: Free product of unital ℓ-groups and free product of generalized MV-algebras. Algebra Univers. (2010). doi: 10.1007/S00012-010-0035-X