TY  - JOUR
TI  - Multi-step optimization of the directly-coupled PV pumping systems
AU  - FIRATOĞLU, Z.A.
AU  - YEŞİLATA, B.
JO  - Sigma Journal of Engineering and Natural Sciences
PY  - 2005
VL  - 23
SP  - 53
EP  - 67
DO  - 
ER  -