1. Collective and Individual-Particle Aspects of Nuclear Structure;Bohr;Kgl. Danske Videnskab. Selskab, Mat.-fys. Medd.,1953
2. Coulomb Excitation of Rare-Earth Nuclei with Alpha Particles;Heydenburg;Phys. Rev.,1955
3. Electric Excitation of Certain Rare-Earth Nuclei by Protons;Mark;Phys. Rev.,1955
4. Measurement of Conversion Electrons from Coulomb Excitation of the Elements in the Rare Earth Region;Huus;Kgl. Danske Videnskab. Selskab, Mat.-fys. Medd.,1956
5. Isomeric Transitions in the Rare-Earth Elements;Hammer;Phys. Rev.,1957