@article{
  author = {Memarian Sorkhabi, Omid},
  title = {Geoid Determination Based on Log Sigmoid Function of Artificial Neural Networks: (A case Study: Iran)},
  journal = {journal of Artificial Intelligence in Electrical Engineering},
  year = {2015},
  volume = {3},
  number = {12},
  pages = {18-24},
  doi = {}
}