WASET
    Ana Paula Esteves and  Diego S. Caetano and  Louise L. B. Lomardo,  The Performance of Natural Light by Roof Systems in Cultural Buildings.   journal   = {International Journal of Urban and Civil Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2018, vol. 138(6). 688 - 693
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10009211.