Mathematical Inequalities & Applications · Volume 11, Issue 3 Refinements, extensions and generalizations of the second Kershaw's double inequality 11-35 Pages 457-465 DOI 10.7153/mia-11-35 Downloads Short PDF Full PDF PNG Authors Feng Qi Xiao-Ai Li Shou-Xin Chen Keywords Kershaw's double inequality refinement extension generalization generalized logarithmic mean ratio of two gamma functions psi function polygamma function inequality monotonicity Subject classes 26A48 26A51 26D20 33B10 33B15 65R10