@article{PismaZhETF.21.253,
    title = {A new singularity in the dispersion of impurity excitation in superfluid helium},
    author = {Esel'son, B. N. and Slyusarev, V. A. and Sobolev, V. I. and Strzhemechnyi, M. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {21},
    issue = {5},
    pages = {253},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22299.shtml},
}