Luu Ba Thang and Nguyen Duc Sang 2025. AN INTEGRAL REPRESENTATION OF THE PELL NUMBERS AND THE PELL-LUCAS NUMBERS. HNUE Journal of Science: Journal of Natural Sciences. 70, 1 (Mar. 2025), 15–21. DOI:https://doi.org/10.18173/2354-1059.2025-0002.