Senlin Guo, “Some conditions for a class of functions to be completely monotonic”, J Inequal Appl, 2015, no. 1, 2015, 11
Feng Qi, Xiao-Jing Zhang, “AN INTEGRAL REPRESENTATION, SOME INEQUALITIES, AND COMPLETE MONOTONICITY OF THE BERNOULLI NUMBERS OF THE SECOND KIND”, Bulletin of the Korean Mathematical Society, 52, no. 3, 2015, 987
Feng Qi, Bai‐Ni Guo, Mathematical Analysis and Applications, 2018, 101
Feng Qi, Wen-Hui Li, “A LOGARITHMICALLY COMPLETELY MONOTONIC FUNCTION INVOLVING THE RATIO OF GAMMA FUNCTIONS”, jaac, 5, no. 4, 2015, 626
Feng Qi, “Completely monotonic degree of a function involving trigamma and tetragamma functions”, AIMS Mathematics, 5, no. 4, 2020, 3391
Bai-Ni Guo, Jiao-Lian Zhao, Feng Qi, “A completely monotonic function involving the tri- and tetra-gamma functions”, Mathematica Slovaca, 63, no. 3, 2013, 469
Feng Qi, Bai-Ni Guo, “Integral representations and complete monotonicity of remainders of the Binet and Stirling formulas for the gamma function”, RACSAM, 111, no. 2, 2017, 425
Feng Qi, Cristinel Mortici, “Some inequalities for the trigamma function in terms of the digamma function”, Applied Mathematics and Computation, 271, 2015, 502
Feng Qi, Qiu-Ming Luo, “Bounds for the ratio of two gamma functions: from Wendel’s asymptotic relation to Elezović-Giordano-Pečarić’s theorem”, J Inequal Appl, 2013, no. 1, 2013, 542