Rasey, J. S. and Nelson, N. J. (1977) “Effect of Roentgen, Cyclotron Neutron, or Mixed Neutron-Photon Fractionated Irradiation of Mice: LD50/4 day values”, Acta Oncologica, 16(6), pp. 525–528. doi: 10.3109/02841867709133974.