CHILDS, Lindsay N.
A Concrete Introduction to Higher Algebra / Lindsay N. Childs. - 2nd ed. - New York [etc.] : Springer, 1995. - xv, 522 str. ; 24 cm. - (Undergraduate Texts in Mathematics)
1.izdanje 1979.g. - Zadaci uz poglavlja; neka rješenja. - Bibliografija: str. 509-512. - Kazalo.
ISBN 0-387-98999-4