@article{JETPL.117.556,
    title = {Acoustic Metric and Planck Constants},
    author = {Volovik, G. E.},
    journal = {JETP Lett.},
    volume = {117},
    issue = {7},
    pages = {551},
    year = {2023},
    doi = {10.1134/S002136402360057X},
    url = {http://jetpletters.ru/ps/dx/10.31857/S1234567823070121},
    note = {[Pisma v ZhETF 117, 556 (2023)]}
}