TY  - BOOK
AU  - Fedoryuk Mikhail V
TI  - Asymptotic analysis: linear ordinary differential equations
SN  -  0387548106
U1  - B331,1, N3 
PY  - 1993///
CY  - Berlin
PB  - Springer-Verlag         
KW  -  Linear
KW  -  Ordinary Differential Equations
KW  - Mathematics
ER  -