@article{PismaZhETF.18.289,
    title = {New singularities in quantum diffusion of $He^3$ in solid helium},
    author = {Grigor'ev, V. N. and Esel'son, B. N. and Mikheev, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {18},
    issue = {5},
    pages = {289},
    year = {1973},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23925.shtml},
}