Costin, Iulia, and Gheorghe Toader. “A Separation of Some Seiffert-Type Means by Power Means”. Rev. Anal. Numér. Théor. Approx. 41, no. 2 (August 1, 2012): 125–129. Accessed April 28, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2012-vol41-no2-art4.