@article{
  author = {Khazaeli-Parsa, Poupak, Aghaie, Mehran, Zare, Karim, Bouzaripour, Azar},
  title = {Complexation of Calcium and Barium Cations by Calix[4]arene-bis-crown-6},
  journal = {Journal of Physical & Theoretical Chemistry},
  year = {2005},
  volume = {1},
  number = {4},
  pages = {23-26},
  doi = {}
}