@article{
  author = {Parand, K., Roozbahani, Z., Bayat Babolghani, F.},
  title = {Solving nonlinear Lane-Emden type equations with unsupervised
 combined artificial neural networks},
  journal = {International Journal of Industrial Mathematics},
  year = {2013},
  volume = {5},
  number = {4},
  pages = {355-366},
  doi = {}
}