1. In the CIA World Fact Book;CIA: Central Intelligence Agency,2016
2. Rapport annuel Eneo –Cameroun 2018 web: eneo.ethicspoint.com.
3. Cameroon and renewable energy. Country at a glance;Federal University of Applied Administrative Sciences,2013
4. Sustainable energy policies in Cameroon: a holistic overview;Muh;Renew. Sustain. Energy Rev.,2020
5. Cameroon-climate investment fund;Minist Environ Prot Nat Sustain Dev n.d.,2016