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 Jul. 22];14(2):138-46. Available from: https://ijiemjournal.uns.ac.rs/index.php/ijiem/article/view/20