Institution: | (1) Center for Gravitation and Fundamental Metrology, VNIIMS, 46 Ozyornaya St., Moscow, 119361, Russia;(2) Institute of Gravitation and Cosmology, Peoples’ Friendship University of Russia, 6 Miklukho-Maklaya St., Moscow, 117198, Russia;(3) Fachbereich Physik, Universit?t Konstanz, Postfach M 677, 78457 Konstanz, Germany |