@article{DAN_1968_182_5_a2,
     author = {Yu. D. Burago and S. Z. Shefel'},
     title = {Nonregular surfaces of bounded outer curvature and isoperimetric type inequalities},
     journal = {Doklady Akademii Nauk},
     pages = {997--999},
     publisher = {mathdoc},
     volume = {182},
     number = {5},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_182_5_a2/}
}