共 28 条
[1]
[Anonymous], 1952, Mat. sb
[2]
[Anonymous], 1911, NEDERL AKAD WETENSCH
[3]
[Anonymous], 1984, TRANSL MATH MONOGRAP
[4]
Artes J. C., 2012, ELECT J DIFFERENTIAL, V2012, P1
[6]
Christopher C., 2007, ADV COURSES MATH
[7]
Darboux G., 1878, B SCI MATH, V2, P151
[9]
Dulac H., 1908, Bull. Sci. Math. Ser., V32, P230
[10]
Dumortier F, 2006, UNIVERSITEXT, P1