TY  - JOUR
AU  - A. A. Tuzhilin
TI  - Morse-type indices of of two-dimensional minimal surfaces in $\mathbf R^3$ and $\mathbf H^3$
JO  - Izvestiya. Mathematics 
PY  - 1992
SP  - 575
EP  - 598
VL  - 38
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1992_38_3_a6/
LA  - en
ID  - IM2_1992_38_3_a6
ER  -