Neagu, Vasile, and Diana Bîclea. “Perturbation of Singular Integral Operators With Piecewise Continuous Coefficients”. Acta et Commentationes Exact and Natural Sciences 16, no. 2 (January 17, 2024): 35-50. Accessed October 16, 2024. https://revistaust.upsc.md/index.php/acta_exacte/article/view/957.