Tanaka , Hiroshi. “UNVEILING THE POTENTIAL OF THE LOGARITHMIC MEAN: AN INTRODUCTION TO THE DIFFERENCE CALCULUS”. International Journal of Engineering Science and Applied Mathematics (IJESAM), vol. 14, no. 12, Dec. 2023, pp. 49-66, https://zapjournals.com/Journals/index.php/ijesam/article/view/1610.