@article{PismaZhETF.35.199,
    title = {Nonlinear delocalization of excited states in disordered crystals},
    author = {Ovsyankin, V. V. and Fedorov, A. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {35},
    issue = {5},
    pages = {199},
    year = {1982},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19873.shtml},
}