ISBN 9780821806012 books & textbook
Symmetries and Integrability of Difference Equations (Crm Proceedings and Lecture Notes, 9)
Levi, D. Vinet, Luc Winternitz, Pavel
Amer Mathematical Society /1996-11-01 Paperback / 388 Pages
isbn-10: 0821806017 / isbn-13: 9780821806012
