1. Design Tool Survey (IUEA Solar Task VIII), Burt Hill Kosar Rittelmann, 400;Rittelmann,1985
2. L. Pamiter and T. Wheeling, SERI-RES Users Guide, SERI, 1617 Cole Boulevard, Golden, CO 80401, U.S.A., undated.
3. Meteo Norm: Daten für den Solarplaner;Bremmer,1985