%0 Journal Article %A Mortimer, B. C. %A Williams, K. S. %T Note on a Paper of S. Uchiyama %J Canadian mathematical bulletin %D 1974 %P 289-293 %V 17 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-057-6/ %R 10.4153/CMB-1974-057-6 %F 10_4153_CMB_1974_057_6