Wikky Fawwaz Al Maki, Khaidir Mauladan, and Indra Bayu Muktyas, “Date Fruit Classification using K-Nearest Neighbor with Principal Component Analysis and Binary Particle Swarm Optimization”, J. RESTI (Rekayasa Sist. Teknol. Inf.) , vol. 7, no. 6, pp. 1456 - 1463, Dec. 2023.