@article{article958,
  title = {Combining trend of renewable energy sources},
  author = {KINCAY, O. and UTLU, Z. and AÄžUSTOS, H. and AKBULUT, U. and AÇIKGÖZ, Ã.},
  journal = {Sigma Journal of Engineering and Natural Sciences},
  year = {2009},
  volume = {27},
  pages = {60-82},
  doi = {}
}