Dong Chongying Generalized vertex algebras and relative vertex operators - Boston Birkhauser 1993 - ix, 202p. cm. - Progress in mathematics; 112 . Index 201-202p ISBN: 0817637214 (hbd) Standard No.: 3243 Source: Narosa, Textual Subjects--Topical Terms: Algebra Algebraic topologyMathematics Dewey Class. No.: B2-316, N3