1. Variational principle and conservation equations in non-local field theory, Mat. Fys. Medd. Dan. Vid. Selsk. 26 (1950) no. 1
2. On some developments in non-local field theory, Progr. Theor. Phys. 5 (1950) 606
3. On field theories with non-localized interaction, Mat. Fys. Medd. Dan. Vid. Selsk. 27 (1952) no. 8
4. On the theory of nuclear level density, in Proc. Int. Conf. on theoretical physics, Kyoto and Tokyo (1953) (Nippon Bunka Insatsuska, Tokyo) p. 339
5. La théorie des réactions nucléaires, Saclay Lecture notes (1953–55)