Yusuf, Zulu Alabi((Federal University of Technology, Minna (Center for Disaster Risk Management and Development Studies) For more information please contact Obiageli Umeugochukwu at obyume@gmail.com, 2016)
van Vuuren, DetlefBakkes, Jan(United Nations Environment Programme (UNEP), and The Netherlands National Institute of Public Health and the Environment (RIVM), 1999)
United Nations Environment Programme (UNEP)Oregon State University (OSU)Scientific and Industrial Research (CSIR)University of Pretoria(United Nations Environment Programme (UNEP), 2005)