%0 Journal Article %A Hofuku, I. %A Oshima, K. %T A method of constructing the frame of a directed graph %J International Journal of Applied Mathematics and Computer Science %D 2013 %P 823-837 %V 23 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_2013_23_4_a10/ %G en %F IJAMCS_2013_23_4_a10