@Article{altinay-yalta:2016,
  author={Galip Altinay and A. Talha Yalta},
  title={Estimating the Evolution of Elasticities of Natural Gas Demand: The Case of {Istanbul}, {Turkey}},
  journal={Empirical Economics},
  year=2016,
  volume={51},
  number={1},
  pages={201--220},
  url={http://link.springer.com/article/10.1007/s00181-015-1012-1}
}