Irawan, Wahri, et al. “Implementation of the Model Capacited Vehicle Routing Problem With Time Windows With a Goal Programming Approach in Determining the Best Route for Goods Distribution”. Jurnal Matematika, Statistika Dan Komputasi, vol. 17, no. 2, Dec. 2020, pp. 231-9, doi:10.20956/jmsk.v17i2.11107.