Advanced Solar Low Energy Buildings. Task 13 of the IEA's Solar Heating
Proceedings of CIB-symposium, Stuttgart 1990, The International Symposium on Energy Efficient Buildings, Leinfelden-Echterdingen, Germany 1993, Innovative Housing '93, Vancouver 1993, ISES Solar World Congress, Budapest 1993, 4th European Conference on Solar Energy in Architecture and Urban Planning, Berlin 1996, and EuroSun '96, Freiburg 1996