Walko, R. J.؛ Rochau, G. E. (1981). "A High Output Neutron Tube Using an Occluded Gas Ion Source". IEEE Transactions on Nuclear Science. ج. 28 ع. 2: 1531–1534. Bibcode:1981ITNS...28.1531W. DOI:10.1109/TNS.1981.4331459.
Walko, R. J.؛ Rochau, G. E. (1981). "A High Output Neutron Tube Using an Occluded Gas Ion Source". IEEE Transactions on Nuclear Science. ج. 28 ع. 2: 1531–1534. Bibcode:1981ITNS...28.1531W. DOI:10.1109/TNS.1981.4331459.