@article{FPM_2000_6_1_a25,
     author = {N. E. Maryukova},
     title = {Constant curvature surfaces in the~constant curvature {quasi-Riemann} space and {the~Klein--Gordon} equation},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {299--303},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2000_6_1_a25/}
}