Physics Physique Fizika 2, 151 (1966) - Published 1 March, 1966

William Silvert

Physics Physique Fizika 2, 153 (1966) - Published 1 March, 1966

E. A. Kaner and V. G. Skobov

Physics Physique Fizika 2, 165 (1966) - Published 1 March, 1966

Э. А. Канер and В. Г. Скобов

Physics Physique Fizika 2, 185 (1966) - Published 1 March, 1966