E. Susila, A. Anwar, A. Syarif, and A. Agustian, “Population and Diversity of Indigenous Arbuscular Mycorrhizal Fungi from Shallots Rhizosphere in Different Altitudes in West Sumatra”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 7, no. 5, pp. 1886–1893, Oct. 2017.