TY  - JOUR
AU  - È. G. Neifel'd
TI  - Intrinsic geometries of a normalized Penrosian
JO  - Trudy Geometricheskogo Seminara
PY  - 1990
SP  - 70
EP  - 73
VL  - 20
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/KUTGS_1990_20_a7/
LA  - ru
ID  - KUTGS_1990_20_a7
ER  -