An application of Lambda-method on inequalities of Shafer-Fink's type
  In this article $\lambda$-method of Mitrinovic-Vasic \cite{MitrinovicVasic70} is applied to improve the upper bound for the arcsin function of L. Zhu \cite{Zhu05} for inequalities of Shafer-Fink's type. 
Branko J. Malesevic