@article{IVM_1968_3_a3,
     author = {A. L. Verner and T. V. Ivanova},
     title = {The area of irregular surfaces in spaces of constant curvature},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {20--27},
     publisher = {mathdoc},
     number = {3},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1968_3_a3/}
}