Juliant, C., Baizal, Z.K.A. and Dharayani, R. 2023. Ontology-Based Physical Exercise Recommender System for Underweight Using Ontology and Semantic Web Rule Language. Journal of Information System Research (JOSH). 4, 4 (Jul. 2023), 1308-1315. DOI:https://doi.org/10.47065/josh.v4i4.3823.