Wet Strength Properties of Handsheet Paper from Empty Oil Palm Fruit Bunch Pulp by the Addition of Polyethylene ImineSari F. Dina, Rycce S. Pratikha, Justaman A. Karo-Karo, Poltak E. Hutajulu and Benny R. FernandezE3S Web Conf., 681 (2025) 02005DOI: https://doi.org/10.1051/e3sconf/202568102005