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Beitalmal AO. Absolutely Continuous Invariant Measures for Piecewise Expanding Chaotic Transformations in R^n with Summable Oscillations of Derivative. JOPAS [Internet]. 2023 Dec. 30 [cited 2024 Nov. 21];22(2):73-82. Available from: https://sebhau.edu.ly/journal/jopas/article/view/2342