2 citations to https://www.mathnet.ru/eng/sigma1780

1. Alexander Dyachenko, Dmitrii Karp, “Integral Representations of Ratios of the Gauss Hypergeometric Functions with Parameters Shifted by Integers”, Mathematics, 10:20 (2022), 3903  
2. Dyachenko A., Karp D., “Ratios of the Gauss Hypergeometric Functions With Parameters Shifted By Integers: More on Integral Representations”, Lobachevskii J. Math., 42:12 (2021), 2764–2776