Firdausi, A., T. Agus Siswoyo, and S. Wiryadiputra. “Identification of Potential Plants Producing Tannin-Protein Complex for a-Amylase As Botanical Pesticide”. Pelita Perkebunan (a Coffee and Cocoa Research Journal), Vol. 29, no. 1, May 2013, doi:10.22302/iccri.jur.pelitaperkebunan.v29i1.189.