A Multiple Classifiers System for Anomaly Detection in Credit Card Data With Unbalanced and Overlapped Classes. - Suraya Nurain Kalid; Keng Hoong Ng; Gee-Kok Tong; Kok-Chin Khor (IEEE Access, 2020)

Construction of Optimal Stock Market Portfolios Using Outlier Detection Algorithm. - Gee-Kok Tong; Keng Hoong Ng; Wun-She Yap; Kok-Chin Khor (SCDS, 2021)

Mitigating unbalanced and overlapped classes in credit card fraud data with enhanced stacking classifiers system. - Nur Amirah Ishak; Keng Hoong Ng; Gee-Kok Tong; Suraya Nurain Kalid; Kok-Chin Khor (F1000Research, 2022)

Detecting Frauds and Payment Defaults on Credit Card Data Inherited With Imbalanced Class Distribution and Overlapping Class Problems: A Systematic Review. - Suraya Nurain Kalid; Kok-Chin Khor; Keng Hoong Ng; Gee-Kok Tong (IEEE Access, 2024)