Safarov, U. “On Singularity of Invariant Measure of Piecewise-Smooth Circle Homeomorphisms With Several Breaks”. Acta of Turin Polytechnic University in Tashkent, vol. 13, no. 2, Sept. 2023, pp. 7-8, https://acta.polito.uz/index.php/journal/article/view/212.