“A.S FOKAS SEPARATION OF VARIABLES METHOD: OVERVIEW” (2023) INTERNATIONAL JOURNAL OF ADVANCED RESEARCH IN ENGINEERING AND TECHNOLOGY (IJARET), 14(6), pp. 78–81. Available at: https://iaeme-library.com/index.php/IJARET/article/view/IJARET_14_06_007 (Accessed: 2 July 2025).