@article{PismaZhETF.27.181,
    title = {Violation of "$\sigma$ H invariance" in optical orientation of spins in semiconductors},
    author = {Merkulov, I. A. and Freisher, V. G.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {27},
    issue = {3},
    pages = {181},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23670.shtml},
}