%0 Journal Article
%A TERAMOTO, KEISUKE
%T FOCAL SURFACES OF WAVE FRONTS IN THE EUCLIDEAN 3-SPACE
%J Glasgow mathematical journal
%D 2019
%P 425-440
%V 61
%N 2
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089518000277/
%R 10.1017/S0017089518000277
%F 10_1017_S0017089518000277