@article{BSMF_1961__89__451_0,
     author = {Irwin, John M. and Walker, Elbert A.},
     title = {On isotype subgroups of abelian groups},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {451--460},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {89},
     year = {1961},
     doi = {10.24033/bsmf.1570},
     mrnumber = {26 #5054},
     zbl = {0102.26701},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1570/}
}