Zhen-Hang Yang, Jing-Feng Tian, “Monotonicity, convexity, and complete monotonicity of two functions related to the gamma function”, RACSAM, 113, no. 4, 2019, 3603
Feng Qi, Ravi P. Agarwal, “On complete monotonicity for several classes of functions related to ratios of gamma functions”, J Inequal Appl, 2019, no. 1, 2019, 36
Feng Qi, Cristinel Mortici, “Some inequalities for the trigamma function in terms of the digamma function”, Applied Mathematics and Computation, 271, 2015, 502
Xu You, Di-Rong Chen, “Improved Approximation Formulas and Inequalities for the Wallis Ratio”, Bull. Iran. Math. Soc., 45, no. 3, 2019, 783
Zhen-Hang Yang, “Some properties of the divided difference of psi and polygamma functions”, Journal of Mathematical Analysis and Applications, 455, no. 1, 2017, 761
Feng Qi, Wen-Hui Li, Shu-Bin Yu, Xin-Yu Du, Bai-Ni Guo, “A ratio of finitely many gamma functions and its properties with applications”, RACSAM, 115, no. 2, 2021, 39
Feng Qi, Wen-Hui Li, “A LOGARITHMICALLY COMPLETELY MONOTONIC FUNCTION INVOLVING THE RATIO OF GAMMA FUNCTIONS”, jaac, 5, no. 4, 2015, 626
Zhen-Hang Yang, Jing-Feng Tian, “Windschitl type approximation formulas for the gamma function”, J Inequal Appl, 2018, no. 1, 2018, 272
Chao-Ping Chen, “A more accurate approximation for the gamma function”, Journal of Number Theory, 164, 2016, 417
Feng Qi, Cristinel Mortici, “Some best approximation formulas and inequalities for the Wallis ratio”, Applied Mathematics and Computation, 253, 2015, 363