%0 Journal Article %A James Renshaw %T On subrings of amalgamated free products of rings %J Colloquium Mathematicum %D 1999 %P 241-248 %V 79 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-79-2-241-248/ %R 10.4064/cm-79-2-241-248 %G en %F 10_4064_cm_79_2_241_248