TY  - BOOK
AU  - Ovsyannikov, L.V.,
AU  - Avdonina, E D ,
AU  - Ibragimov, Nail H ,
TI  - Lectures on the theory of group properties of differential equations
SN  - 9789814460811
U1  - 515.35 OVS  
PY  - 2013///
CY  - New Jersey
PB  - World Scientific
ER  -