TY - JOUR AU - Yu. A. Aminov TI - On the nonbendability of closed surfaces of trigonometric type JO - Sbornik. Mathematics PY - 1992 SP - 549 EP - 560 VL - 71 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1992_71_2_a17/ LA - en ID - SM_1992_71_2_a17 ER -