Lecian, Orchidea. “Reduced 2-Dimensional Birkhoff Surfaces of Section of the Desymmetrized P SL(2, Z) Group: The Anosov Characterization”. International Journal Of Mathematics And Computer Research 11, no. 2 (February 21, 2023): 3261-3267. Accessed May 19, 2026. https://www.ijmcr.everant.org/index.php/ijmcr/article/view/526.