@article{TMF_2016_189_1_a4,
     author = {P. G. Grinevich and P. M. Santini},
     title = {An~integral geometry lemma~and its applications: {The~nonlocality} of {the~Pavlov} equation and a~tomographic problem with opaque parabolic objects},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {59--68},
     publisher = {mathdoc},
     volume = {189},
     number = {1},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2016_189_1_a4/}
}