@article{10_4064_cm_79_2_241_248,
     author = {James Renshaw},
     title = {On subrings of amalgamated free products of rings},
     journal = {Colloquium Mathematicum},
     pages = {241--248},
     publisher = {mathdoc},
     volume = {79},
     number = {2},
     year = {1999},
     doi = {10.4064/cm-79-2-241-248},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-79-2-241-248/}
}