Mathematical Inequalities & Applications · Volume 20, Issue 3 Completely monotonic functions related to Gurland's ratio for the gamma function 20-43 Pages 651-659 DOI 10.7153/mia-20-43 Downloads Short PDF Full PDF PNG Authors Chao-Ping Chen Junesang Choi Keywords Gamma function psi function polygamma functions completely monotonic function Gurland's ratio Subject classes 33B15 26A48