TY  - JOUR
AU  - Nicola Arcozzi
AU  - Fausto Ferrari
TI  - The Hessian of the distance from a surface in the Heisenberg group
JO  - Annales Fennici Mathematici
PY  - 2008
SP  - 35
EP  - 63
VL  - 33
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AFM_2008_33_1_a1/
LA  - en
ID  - AFM_2008_33_1_a1
ER  -