Din Tong-Ren, Li Cheng-Zhi. Ordinary differential equations (second edition). Beijing. 2002.

丁同仁，李承治。常微分方程(第二版).北京。2002。

youdao

Din Tong-Ren, Li Cheng-Zhi. Ordinary differential equations (second edition). Beijing. 2002.

丁同仁，李承治。常微分方程(第二版).北京。2002。

youdao