Atom interferometry gravity-gradiometer for the determination of the Newtonian gravitational constant GA. Bertoldi, G. Lamporesi, L. Cacciapuoti, M. de Angelis, M. Fattori, T. Petelski, A. Peters, M. Prevedelli, J. Stuhler and G. M. TinoEur. Phys. J. D, 40 2 (2006) 271-279DOI: https://doi.org/10.1140/epjd/e2006-00212-2