@article{10_21136_CMJ_1994_128447,
     author = {Bican, Ladislav},
     title = {Butler groups of infinite rank},
     journal = {Czechoslovak Mathematical Journal},
     pages = {67--79},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1994},
     doi = {10.21136/CMJ.1994.128447},
     mrnumber = {1257937},
     zbl = {0812.20032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1994.128447/}
}