TY  - BOOK
AU  - Berhanu, Shiferaw
AU  - Cordaro, Paulo D
TI  - An introduction to involutive structures
SN  - 9780521878579
U1  - 515.63 BER 
PY  - 2008///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Approximation theory
ER  -