@article{PismaZhETF.48.273,
    title = {Quantum-mechanical conductivity of a ballistic point contact},
    author = {Levinson, I. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {48},
    issue = {5},
    pages = {273},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16712.shtml},
}