@article{JETPL.114.204,
    title = {Correlation Properties of an Optical?Terahertz Biphoton Field},
    author = {Prudkovskii, P. A.},
    journal = {JETP Lett.},
    volume = {114},
    issue = {4},
    pages = {173},
    year = {2021},
    doi = {10.1134/S0021364021160098},
    url = {http://jetpletters.ru/ps/dx/10.31857/S1234567821160023},
    note = {[Pisma v ZhETF 114, 204 (2021)]}
}