Modelling of ammonia nitrogen in river using soft computing techniquesRen Jie Chin, Wing Son Loh, Voon Hao Chai, Bryan Seng Haw Yap, Kar Hui Chan and Britney Wan Xing SimE3S Web Conf., 347 (2022) 04001DOI: https://doi.org/10.1051/e3sconf/202234704001