@article{SM_1976_30_3_a5,
     author = {V. T. Fomenko and S. B. Klimentov},
     title = {Nonbendability of closed surfaces of genus $p\geqslant1$ and positive extrinsic curvature},
     journal = {Sbornik. Mathematics},
     pages = {361--372},
     publisher = {mathdoc},
     volume = {30},
     number = {3},
     year = {1976},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1976_30_3_a5/}
}