1. Technologies for biogas upgrading to biomethane: a review;Adnan;Bioengineering,2019
2. Anaerobic treatment of brewery wastes;Akunna,2015
3. Anaerobic Waste-Wastewater Treatment and Biogas Plants: A Practical Handbook;Akunna,2018
4. Co-digestion of terrestrial plant biomass with marine macro-algae for biogas production;Akunna;Biomass Bioenergy,2016
5. Assessment of the anaerobic biodegradability of macropollutants;Angelidaki;Rev. Environ. Sci. Biotechnol.,2004