2 citations to https://www.mathnet.ru/rus/tm796

1. Shatha Sami Alhily, “Higher Integrability of the Gradient of Conformal Maps”, SSRN Journal, 2013  
2. Petrie B.J., “Leonhard Euler's Use and Understanding of Mathematical Transcendence”, Hist. Math., 39:3 (2012), 280–291