ISBN 0821841831 books & textbook
Qualitative Theory of Differential Equations (Translations of Mathematical Monographs, 101)
Zhang Zhi-fen Ding Tong-ren Huang Wen-zao Dong Zhen-xi
American Mathematical Society /2006-07-26 Paperback / 461 Pages
isbn-10: 0821841831 / isbn-13: 9780821841839
