Nariyana, Calvien Danny, Mohammad Idhom, and Trimono Trimono. 2025. “Prediction of Purchase Volume Coffee Shops in Surabaya Using Catboost With Leave-One-Out Cross Validation”. Jurnal Ilmiah Teknik Elektro Komputer Dan Informatika 11 (1):124-38. https://doi.org/10.26555/jiteki.v11i1.30610.