@article{JETPL.111.230,
    title = {Raman Spectroscopy of Nanopolycrystalline Diamond Produced from Shungite at 15 GPa and 1600œC},
    author = {Afanas?ev, V. P. and Litasov, K. D. and Goryainov, S. V. and Kovalevskii, V. V.},
    journal = {JETP Lett.},
    volume = {111},
    issue = {4},
    pages = {218},
    year = {2020},
    doi = {10.1134/S0021364020040050},
    url = {http://jetpletters.ru/ps/dx/10.31857/S0370274X20040050},
    note = {[Pisma v ZhETF 111, 230 (2020)]}
}