Qualitative theory of differential equations/
Zhang Zhi-fen ... [et al.] ; translated by Anthony Wing-Kwok Leung.
- Providence, R.I.: American Mathematical Society, c1992.
- xiv, 461 p.: ill.; 26 cm.
- Translations of mathematical monographs, v. 101. .
Translation of: Wei fen fang chªeng ting hsing li lun.