PACS:94.30.Kq, 94.30.Lr, 94.30.Va, 94.30.Ny, 94.30.cl (all) DOI:10.1070/PU1971v014n03ABEH004717 URL: https://ufn.ru/en/articles/1971/3/o/ Citation: Gurevich A V, Tsedilina E E, Shcherbakov V P "Resonant Protons and the Electric Field in the Earth's Magnetosphere" Sov. Phys. Usp.14 363–364 (1971)