@article{MZM_1977_21_2_a0,
     author = {I. Kh. Sabitov},
     title = {Embedding two-dimensional metrics in~$E^4$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {137--140},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_21_2_a0/}
}