1. Variational principle and conservation equations in non-local field theory;Mat. Fys. Medd. Dan. Vid. Selsk.,1950
2. On some developments in non-local field theory;Progr. Theor. Phys.,1950
3. On field theories with non-localized interaction;Mat. Fys. Medd. Dan. Vid. Selsk.,1952
4. On the theory of nuclear level density,1953
5. Saclay Lecture notes;La théorie des réactions nucléaires,1953