TY  - JOUR
AU  - S. V. Ivanov
TI  - Distance difference functions on nonconvex boundaries of Riemannian manifolds
JO  - Algebra i analiz
PY  - 2021
SP  - 81
EP  - 92
VL  - 33
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_2021_33_1_a3/
LA  - ru
ID  - AA_2021_33_1_a3
ER  -