@article{DAN_1974_217_5_a1,
     author = {I. N. Vekua},
     title = {On a functional equation in the theory of minimal surfaces},
     journal = {Doklady Akademii Nauk},
     pages = {997--1000},
     publisher = {mathdoc},
     volume = {217},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_217_5_a1/}
}