Nazirah Zainul Abidin and  Nurul Zahirah Mokhtar Azizi,  Identification of Factors Influencing Costs in Green Projects.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2016, vol. 117(9). 1160 - 1165
    [viewed 28 February 2020]. Available from: https://publications.waset.org/pdf/10005358.