@article{PismaZhETF.27.491,
    title = {Two-dimensional quantum crystal with ground-state vacancies-$He^3$ on graphite},
    author = {Feigel'man, M. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {27},
    issue = {9},
    pages = {491},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23750.shtml},
}