@article{PismaZhETF.100.336,
    title = {Optical bistability through cavity effect in a four-level open atomic  medium},
    author = {Hamedi, H. R.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {100},
    issue = {5},
    pages = {336},
    year = {2014},
    doi = {10.7868/S0370274X14170032},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X14170032},
}