1. A. Bohr:Botational States in Atomic Nuclei (Copenhagen, 1954) and a forthcoming article on Coulomb excitation byK. Alder, A. Bohr, T. Huus, B. R. Mottelson, andA. Winther (to appear inThe Reviews of Modern Physics).
2. Added March 1958: The isomerio transition has now been established to be of El type with a forbiddenness factor of about 1015 (G. Scharff-Goldhaber, M. McKeown, andJ. W. Mihelich:Bull. Am. Phys. Soc., in press).
3. A. Bohr, P. O. Fröman, andB. E. Mottelson:Dan. Mat. Fys. Medd.,29, No. 10 (1955), andG. Alaga, K. Alder, A. Bohr, andB. R. Mottelson:Dan. Mat. Fys. Medd.,29, No. 9 (1955).
4. A. Bohr, P. O. Fröman, andB. R. Mottelson:Dan. Mat. Fys. Medd.,29, No. 10 (1955). Cf. also a forthcoming, more extensive article byP. O. Fröman (to appear inDan, Mat. Fys. Medd.).
5. P. O. Fröman, to be published.