1. Alefeld, G., 1983. Double-effect, triple-effect and quadruple-effect absorption machines. In: Sixteenth International Congress of Refrigeration, Paris, pp. 951–956.
2. Altenkirch, E., Tenckhoff, B., 1914. Absorptionskaeltemaschine zur kontinuierlichen Erzeugung von Kaelte und Waerme oder auch von Arbeit, German Patent 278,076.
3. Comparative simulation and investigation of ammonia–water: absorption cycles for heat pump applications;Engler;Int. J. Refrigeration,1997
4. Waste-heat-powered Icemaker for Isolated Fishing Villages;Erickson,1995
5. Erickson, D.C., Anand, G., Papar, R.A., 1996. Branched GAX cycle gas fired heat pump. Energy Conversion Engineering Conference, 1996, IECEC 96, Proceedings of the 31st Intersociety, vol. 1072, pp. 1078–1083.