James, P., 1997; 'The Sustainability Circle: a new tool for product development and design', Journal of Sustainable Product Design 2: 52:57, http://www.cfsd.org.uk/journal
doi.org
Díaz-García, Cristina; González-Moreno, Ángela; Sáez-Martínez, Francisco J. (2015). "Eco-innovation: insights from a literature review". Innovation: Management, Policy & Practice. 17 (1): 6–23. doi:10.1080/14479338.2015.1011060.
Rennings, Klaus (2000). "Redefining innovation - eco-innovation research and the contribution from ecological economics". Ecological Economics. 32 (2): 319–332. doi:10.1016/S0921-8009(99)00112-3.
Karakaya, Emrah; Hidalgo, Antonio; Nuur, Cali (2014). "Diffusion of eco-innovations: A review". Renewable and Sustainable Energy Reviews. 33: 392–399. doi:10.1016/j.rser.2014.01.083.