Sheft, Irving; Fried, Sherman. New Neptunium Compounds. U.S. Atomic Energy Commission, Technical Information Division. 1950: 4 [16 August 2021]. (原始内容存档于2021-08-16) (英语).
Sheft, Irving; Fried, Sherman. New Neptunium Compounds. U.S. Atomic Energy Commission, Technical Information Division. 1950: 4 [16 August 2021]. (原始内容存档于2021-08-16) (英语).