%0 Journal Article
%A Mancho Manev
%A Veselina Tavkova
%T Hyperspheres in Euclidean and Minkowski 4-spaces
as almost paracontact almost paracomplex Riemannian manifolds
%J Novi Sad Journal of Mathematics
%D 2021
%P 175 - 185
%V 51
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.30755/NSJOM.12136/
%R 10.30755/NSJOM.12136
%F 10.30755/NSJOM.12136