@article{TMF_2020_204_2_a8,
     author = {A. M. Kamchatnov and M. V. Pavlov},
     title = {Two-photon propagation of light and the~modified {Liouville} equation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {297--304},
     publisher = {mathdoc},
     volume = {204},
     number = {2},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2020_204_2_a8/}
}