Stern, A. (1934). "The new element bohemium the origin of proto-actinium". Journal of the Society of Chemical Industry53: 581. doi:10.1002/jctb.5000533104.
Ruth Lewin Sime (2000). "The Search for Transuranium Elements and the Discovery of Nuclear Fission". Physics in Perspective2 (1): 48–62. doi:10.1007/s000160050036. Bibcode: 2000PhP.....2...48S.
Ruth Lewin Sime (2000). "The Search for Transuranium Elements and the Discovery of Nuclear Fission". Physics in Perspective2 (1): 48–62. doi:10.1007/s000160050036. Bibcode: 2000PhP.....2...48S.