Algebra. Some Current Trends: Proceedings of the 5th National School in Algebra, held in Varna, Bulgaria, Sept. 24 - Oct. 4, 1986 Lecture Notes in Mathematics, nr. 1352 Editat de Luchezar L. Avramov et al. 26 oct 1988 Paperback Preț: 319.77 lei 6-8 săpt.