1. Overdekkingsen Verschuivingsmetingen met resonantieneutronen;Diemer;Thesis,1943
2. The resonance levels for neutron capture;de Vries;Physica,1943
3. The resonance levels for neutron capture;Diemer;Physica,1943
4. The same (see page 315 and fig. 2 page 316).
5. The resonance levels for neutron capture;Coster;Physica,1943