DIFFERENCE EQUATIONS AN INTRODUCTION WITH APPLICATIONS SECOND EDITION
WALTER G.KELLEY ALLAN C.PETERSON2001 年出版403 页ISBN：
DIFFERENTIAL FORMS WITH APPLICATIONS TO THE PHYSICAL SCIENCES
HARLEY FLANDERS1963 年出版203 页ISBN：
Algebraic Systems of Equations and Coputatiional Complexity Theory
Zeke Wang Senlin Xu，Tangan Gao1994 年出版244 页ISBN：7030039440
