M. M. Malamud and R. Zuidwijk, “Simultaneous similarity of pairs of convolution Volterra operators to fractional powers of the operator of integration”, MFAT, vol. 9, no. 2, pp. 154–162, Jun. 2003, Accessed: Dec. 17, 2025. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/211