Pancaningtyas, S. “Callogenesis and Embryogenic Potential of New Superior Cocoa (Theobroma Cacao L.) Genotypes Treated With Ascorbic Acid”. Pelita Perkebunan (a Coffee and Cocoa Research Journal), Vol. 37, no. 3, Dec. 2021, pp. 184-96, doi:10.22302/iccri.jur.pelitaperkebunan.v37i3.472.