%0 Journal Article %A Sergey Stepanov %A Josef Mikeš %T Application of the Hopf Maximum Principle to the Theory of Geodesic Mappings %J Kragujevac Journal of Mathematics %D 2021 %P 781 %V 45 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2021_45_5_a8/ %G en %F KJM_2021_45_5_a8