1. Agrifood supply chain, private-sector standards, and farmers’ health: evidence from Kenya;Asfaw;Agric. Econ.,2010
2. Investment in compliance with GlobalGAP standards: Does it pay off for small-scale producers in Kenya?;Asfaw;Q. J. Int. Agric.,2009
3. BAS, 2016. ‘Biosolids Assurance Scheme _ The scheme standard’. UK.
4. Soil organic carbon dynamics, functions and management in West African agro-ecosystems;Bationo;Agric. Syst.,2007
5. Beecher, N., Connell, B., Epstein, E., Filtz, J., Goldstein, N., Lono, M., 2004. Public perception of biosolids recycling: Developing public participation and earning trust, water environment federation.