TY  - JOUR
AU  - Mancho Manev
AU  - Veselina Tavkova
TI  - Hyperspheres in Euclidean and Minkowski 4-spaces
as almost paracontact almost paracomplex Riemannian manifolds
JO  - Novi Sad Journal of Mathematics
PY  - 2021
SP  - 175 
EP  -  185
VL  - 51
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.30755/NSJOM.12136/
DO  - 10.30755/NSJOM.12136
ID  - 10.30755/NSJOM.12136
ER  -