1. Second law optimization of solar air heaters, part 1;Altfeld;Solar Energy,1988
2. Exergetische Optimierung flacher solarer Lufterhitzer;Altfeld,1985
3. Second law optimization of absorbers for solar air heaters: The influence of fins and materials;Altfeld,1983
4. Exergetische Optimierung von flachen solaren Lufterhitzern;Altfeld;Heizung, Lüftung/Klima, Haustechnik (HLH),1985
5. Entropy Generation Through Heat and Fluid Flow;Bejan,1982