TY  - DATA
AU  - Meziani, Abdelhamid
TI  - On first and second order planar elliptic equations with degeneracies 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9780821887509 (online)
PY  - 2011///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/1019
ER  -