1. Theory of Besselfunctions;Watson,1948
2. Over de diffusie van thermische neutronen;Nuyens;Kon. VI. Ac. Wetensch., Jaargang,1950
3. The exact mathematical Theory of Multiple Scattering of Particles in an infinite Medium;Grosjean;Kon. VI. Ac. Wetensch., Jaargang,1951
4. Note on the diffraction of light by a finite number of centres distributed at random