Novarika, W., S. B. Sinaga, and S. Y. Prayogi. “Reducing Operational Costs in a Manufacturing System That Incorporates Quality Assurances, Probabilistic Failures, Overtime and Outsourcing”. Eastern-European Journal of Enterprise Technologies, vol. 4, no. 13 (130), Aug. 2024, pp. 19-30, doi:10.15587/1729-4061.2024.306083.