@article{IVM_2002_3_a4,
     author = {N. E. Maryukova},
     title = {Surfaces of constant curvature in a {quasi-pseudo-Riemannian} space of constant curvature, and the {Klein{\textendash}Gordon} equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {36--41},
     year = {2002},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2002_3_a4/}
}