@conference{Sad2017,
  author    = {Sadinov, S., Kanev, J.},
  title     = {Study of E-Learning Systems},
  booktitle = {Sinteza 2017 - International Scientific Conference on Information Technology and Data Related Research},
  year      = 2017,
  doi       = {10.15308/Sinteza-2017-208-213},
  pages     = {208-213}
}