RIVAI, R.R., WARDANI, F.F. and ZULKARNAEN, R.N. (2017) “The effect of NPK fertilizer and planting media on plant growth and saponin content of the medicinal plant Anchomanes difformis”, Nusantara Bioscience, 9(2), pp. 141–145. doi:10.13057/nusbiosci/n090206.