[Šipkovs, P. (2009). Zinātne - racionālai energoresursu izmantošanai. Latv. J. Phys. Tec. Sci., 46 (5) 3-15.]Search in Google Scholar
[Kancevica, L., Navickas, J., Ziemelis, E., & Ziemelis, I. (2006). Increase of the Efficiency of Solar Collectors. In: Biometrics and Information Technologies in Agriculture: Research and Development Conf., (89-92). Kaunas: Lithuanian University of Agriculture.]Search in Google Scholar
[Pelēce, I. (2010). Modelling of new constructions of solar collectors. In: Applied Informatics and Communication Technologies Conf., 22-23 April, Jelgava: LLU.]Search in Google Scholar
[Pelēce, I., Iljins, U., & Ziemelis, I. (2008). Forecast of Energy Received by Solar Collectors. In: Applied Information and Communication Technologies Conf., (62-67). 10-12 April, Jelgava: LLU.]Search in Google Scholar
[Young, A. T. (1994) Air mass and refraction. Applied Optics, 33, 1108-1110.10.1364/AO.33.00110820862124]Search in Google Scholar
[Pelēce I. (2008). Influence of nebulosity on the use of solar energy in Latvia. In: Engineering for Rural Development Conf., (28-33). Jelgava: LLU.]Search in Google Scholar
