Conner, P.E. A survey of trace forms algebraic number fields / P.E. Coner, R.Perlis. - 1a. ed. - Singapure : World Scientifique, c1984 - ix, 316 p. : íl. ; 24 cm. - World Scientific publishing co pte Ltd. . ISBN: 9971966042 Subjects--Topical Terms: Algebra universal LC Class. No.: QA251 / C66 1984