@article{PismaZhETF.50.236,
    title = {Relativistic Coulomb problem and bound states in continuum},
    author = {Arbuzov, B. A. and Boos, E. E. and Savrin, V. I. and Shichanin, S. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {50},
    issue = {5},
    pages = {236},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17095.shtml},
}