%0 Journal Article
%A T. Q. Hung
%A N. T. T. Duong 
%T Generalizations of Fagnano's Problem
%J Journal for geometry and graphics
%D 2021
%P 61-69
%V 25
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JGG_2021_25_1_JGG_2021_25_1_a5/
%F JGG_2021_25_1_JGG_2021_25_1_a5