@article{MZM_2023_113_1_a13,
     author = {M. B. Karmanova},
     title = {Measure of {Images} of {Contact} {Mappings} on {Two-Step} {Sub-Lorentzian} {Structures}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {149--153},
     publisher = {mathdoc},
     volume = {113},
     number = {1},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2023_113_1_a13/}
}