Mathematical Inequalities & Applications · Volume 22, Issue 2 Interval-type theorems concerning quasi-arithmetic means 22-35 Pages 509-518 DOI 10.7153/mia-2019-22-35 Downloads Short PDF Full PDF PNG Authors Paweł Pasteczka Keywords quasi-arithmetic means sandwich theorems Arrow-Pratt index comparability smoothness assumptions Subject classes 26E60 26D15