@article{10_4064_fm_50_1_63_71,
     author = {Stanis{\l}aw Balcerzyk and Jan Mycielski},
     title = {On faithful representations of free products of groups},
     journal = {Fundamenta Mathematicae},
     pages = {63--71},
     publisher = {mathdoc},
     volume = {50},
     number = {1},
     year = {1961},
     doi = {10.4064/fm-50-1-63-71},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-50-1-63-71/}
}