Bakhtin , A.K. and Zabolotnii, Y.V. 2021. Estimates of the products of inner radii for multiconnected domains. Ukrains’kyi Matematychnyi Zhurnal. 73, 1 (Jan. 2021), 9 - 22. DOI:https://doi.org/10.37863/umzh.v73i1.6200.