WASET
    M. F. Chow and  M. F. Abu Bakar,  A Review on the Development and Challenges of Green Roof Systems in Malaysia.   journal   = {International Journal of Architectural and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 109(1). 16 - 20
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10003379.