István Patkó and  Hosam Bayoumi Hamuda and  András Medve and  András Szeder,  The Optimization of Sun Collector Parameters.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2014, vol. 95(11). 750 - 754
    [viewed 25 May 2022]. Available from: https://publications.waset.org/pdf/9999653.