@article{SM_1992_71_2_a17,
     author = {Yu. A. Aminov},
     title = {On the nonbendability of closed surfaces of trigonometric type},
     journal = {Sbornik. Mathematics},
     pages = {549--560},
     year = {1992},
     volume = {71},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1992_71_2_a17/}
}