TY  - BOOK
AU  - Burkill J C Au.
TI  - The theory of ordinary differential equation
U1  - B331, J6 
PY  - 1956///
CY  - New York 
PB  - Oliver and boyd    
KW  -  Legendre function
KW  -  Singularies of equations
KW  - Control integral solution
ER  -