Jibran Khan, and Mudassar Hassan Arsalan. “Implementation of Open Source GIS Tools to Identify Bright Rooftops for Solar Photovoltaic Applications – A Case Study of Creek Lanes, DHA, Karachi”. Journal of Basic & Applied Sciences, vol. 12, Jan. 2016, pp. 14-22, doi:10.6000/1927-5129.2016.12.03.