Nariyana, C.D. et al. 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 (Mar. 2025), 124–138. DOI:https://doi.org/10.26555/jiteki.v11i1.30610.