Affiliation: | (1) Department of Theoretical Physics, Yaroslavl', State Pedagogical University, 107 Respublikanskaya Street, Yaroslavl', 150000, Russia;(2) Department of Theoretical Physics, Peoples', Friendship University of Russia, 6 Miklukho-Maklaya Street, Moscow, 117198, Russia;(3) Institute of Gravitation and Cosmology, Peoples', Friendship University of Russia, 6 Miklukho-Maklaya Street, Moscow, 117198, Russia |