Chadwick, James (1932). “The existence of a neutron”. Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences136 (830): 692–708. Bibcode: 1932RSPSA.136..692C. doi:10.1098/rspa.1932.0112.
Chadwick, James (1932). “The existence of a neutron”. Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences136 (830): 692–708. Bibcode: 1932RSPSA.136..692C. doi:10.1098/rspa.1932.0112.