The Semigroup of the Nonunits of the Multiplicative Semigroup of Residue Classes Modulo m
Harry S. Vandiver, Milo W. Weaver · American Mathematical Monthly · 1958
H. S. Vandiver, Milo W. Weaver, The Semigroup of the Nonunits of the Multiplicative Semigroup of Residue Classes Modulo m, The American Mathematical Monthly, Vol. 65, No. 8, Part 2: Introduction to Arithmetic Factorization and Congruences from the Standpoint of Abstract Algebra (Oct., 1958), pp. 48-51