1. Solar and water energy for horticultural uses in Japan;Kozai,1985
2. Heat Pumps;Heap,1979
3. Heat pumps for temperature control in Michigan greenhouses;Rotz,1981
4. Applications of a heat pump in greenhouse environmental control (1) Heating system (written in Japanese with English summary);Hayashi;Journal of Agricultural Meteorology,1983
5. Economic aspects of heat pumps in greenhouse horticulture;Huys;Acta Horticulturae,1981