Vashpanova, Nina, Aleksandr Savchenko, and Nataliia Vasylieva. 2021. “Generalized φ(Ric)-Vector Fields in Special Pseudo-Riemannian Spaces”. Proceedings of the International Geometry Center 14 (4), 1-12. https://doi.org/10.15673/tmgc.v14i4.2155.