Siahaan AA, Asrol M. Development of a Machine Learning Model for Predicting Hardness in the Water Treatment Pharmaceutical Industry. Int J Ind Eng Manag [Internet]. 2023 Jun. 1 [cited 2024 Nov. 15];14(2):138-46. Available from: http://sp.ftn.uns.ac.rs/index.php/ijiem/article/view/20