@article{INTO_2022_215_a7,
     author = {A. V. Kostin},
     title = {Beltrami theorem in {Minkowski} space},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {73--80},
     publisher = {mathdoc},
     volume = {215},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2022_215_a7/}
}