1. Modern offices: a user survey;Langdon,1966
2. Modern offices: a user survey;Langdon,1966
3. Flexibele lichtschakelsystemen en energiemanagement;Wolter;Elektro Magazine (Special),1985
4. Energy consumption for heating and cooling in relation to building design;van der Bruggen,1978
5. Inventarisatie van eisen voor daglichthoeveelheidsmetingen;Rutten,1982