@article{
  author = {Nikoorazm, M., Vessally, E., Abolfathi, E.},
  title = {Steric effects on the Singlet–Triplet Energy Gaps of Seven Membered Ring silylenes, R2C6H6Si},
  journal = {Journal of Physical & Theoretical Chemistry},
  year = {2015},
  volume = {12},
  number = {1},
  pages = {11-17},
  doi = {}
}