@article{PismaZhETF.35.220,
    title = {Angular condition imposed on the state vector of a compound system for  a light front},
    author = {Karmanov, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {35},
    issue = {5},
    pages = {220},
    year = {1982},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19884.shtml},
}