Ismiyati.., SuryaniA., MangunwidjayaD., Machfud.., and HambaliE. “Production Of Sodium Lignosulphonate From Isolated Lignin Of Empty Fruit Bunch : Indentification And Performance Test As A Dispersant Agent”. Jurnal Teknologi Industri Pertanian, Vol. 19, no. 1, May 2010, https://journal.ipb.ac.id/index.php/jurnaltin/article/view/1101.