@article{RSMUP_2006__115__265_0,
     author = {David, Cliff and Wiegold, James},
     title = {6-BFC groups},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {265--272},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {115},
     year = {2006},
     mrnumber = {2245600},
     zbl = {1167.20325},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_2006__115__265_0/}
}