Ansar, A., G. M. D. Putra, and O. S. Ependi. “Analysis of Type and Length Axis Variations on Plant Growth in Hydroponic Systems”. Jurnal Ilmiah Rekayasa Pertanian Dan Biosistem, vol. 7, no. 2, Sept. 2019, pp. 166-73, doi:10.29303/jrpb.v7i2.124.