@article{10_4064_cm109_2_11,
     author = {Clorinda De Vivo and Claudia Metelli},
     title = {Butler groups splitting over a base element},
     journal = {Colloquium Mathematicum},
     pages = {297--305},
     publisher = {mathdoc},
     volume = {109},
     number = {2},
     year = {2007},
     doi = {10.4064/cm109-2-11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm109-2-11/}
}