TY  - BOOK
AU  - Nazaikinskii Vladimir E
AU  - Shatalov Victor E
AU  - Sternin Boris Yu
TI  - Contact geometry and linear differential equations
SN  - 3-11-013381-4
U1  - 515.354 
PY  - 1992///
CY  - Berlin
PB  - Walter de Gruyter
KW  - Linear differential equations
KW  - WKB approximation
ER  -