@article{PismaZhETF.57.174,
    title = {Doping-induced exciton transition},
    author = {Babichenko, V. S. and Kiselev, M. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {57},
    issue = {3},
    pages = {174},
    year = {1993},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17757.shtml},
}