1. Five Years Continuous Recording of Total and Diffuse Solar Radiations;Blackwell;Air Ministry Met. Res. Ctee., London, M.R.P. 895,1954
2. Enregistrement séparé des composantes du rayonnement solaire;Schuepp;Bull. Serv. M. Congo Belge,1952
3. On the measurement of sky radiation;Drummond;Arch. Meteor. Geophys. Bioklim. Ser.,1956