@article{JETPL.114.635,
    title = {Direct Measurement of the Correlation Function of Optical?Terahertz Biphotons},
    author = {Leontyev, A. A. and Kuznetsov, K. A. and Prudkovskii, P. A. and Safronenkov, D. A. and Kitaeva, G. Kh.},
    journal = {JETP Lett.},
    volume = {114},
    issue = {10},
    pages = {565},
    year = {2021},
    doi = {10.1134/S0021364021220082},
    url = {http://jetpletters.ru/ps/dx/10.31857/S123456782122002X},
    note = {[Pisma v ZhETF 114, 635 (2021)]}
}