Koppitz, Jorg. M-solid varieties of algebras / by J. Koppitz, K. Denecke. - New York, NY : Springer, 2006. - xiii, 341 p. : - Advances in mathematics ; v. 10 . ISBN: 9780387308043 Subjects--Topical Terms: Algebraic varieties.Semigroups.Semirings (Mathematics) Universal Decimal Class. No.: 512.53 / KOP