Situmorang, H., A. Adiyanto, and M. Asbari. “Design of Web-Based Information System for Preventive Maintenance on Forklifts With Fuzzy Logic Method at PT Henkel Footwear Speciality and Adhesives”. UJoST- Universal Journal of Science and Technology, vol. 1, no. 1, Sept. 2022, pp. 28-35, doi:10.11111/ujost.v1i1.57.