Ghiti, Hassina, et al. “Effects of Epigeic Earthworms, Eisenia Fetida on Carbon and Nitrogen During Vermicomposting of Fresh Bio-Waste”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 27, no. 2, May 2016, pp. 148-57, https://gssrr.org/JournalOfBasicAndApplied/article/view/5689.