Hazewinkel M. Algebras, rings and modules : vol. 1 / M. Hazewinkel, N. Gubareni, V. V. Kirichenko, 2005 r=on-line
Gubareni N.M. Rings and modules / N.M.Gubareni,V.V.Kirichenko, 2001. - 306 p. - Текст : непосредственный.