TY  - JOUR
AU  - E. S. Zaputryaeva
TI  - Isometric deformations of planar quadrilaterals with constant index
JO  - Sbornik. Mathematics
PY  - 2014
SP  - 663
EP  - 683
VL  - 205
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2014_205_5_a3/
LA  - en
ID  - SM_2014_205_5_a3
ER  -