A. Kashuri, M. Ramosaçaj, and R. Liko, “Some new bounds оf Gauss – Jacobi аnd Hermite – Hadamard type integral inequalities”, Ukr. Mat. Zhurn., vol. 73, no. 8, pp. 1067–1084, Aug. 2021, doi: 10.37863/umzh.v73i8.603.