Bai-Ni Guo, Feng Qi, Jiao-Lian Zhao, Qiu-Ming Luo, “Sharp Inequalities for Polygamma Functions”, Mathematica Slovaca, 65, no. 1, 2015, 103
Zhenhang Yang, Jing-Feng Tian, “A comparison theorem for two divided differences and applications to special functions”, Journal of Mathematical Analysis and Applications, 464, no. 1, 2018, 580
Zhenhang Yang, Jing-Feng Tian, “Complete monotonicity of the remainder of the asymptotic series for the ratio of two gamma functions”, Journal of Mathematical Analysis and Applications, 517, no. 2, 2023, 126649