Development of Ultralow Interfacial Tension Lignosulfonate from Kraft Black Liquor for Enhanced Oil Recovery. - Azis, Muhammad Mufti; Febrina, Fergie; Anindia, Ignesti; Darmawati, Galuh Almas; Fenyka, Desi Amalia; Purwono, Suryo; Rochmadi (Journal of Engineering & Technological Sciences, 2021)