@article{ADM_2009_4_a2,
     author = {A. Ballester-Bolinches and John Cossey and R. Esteban-Romero},
     title = {A characterization via graphs of the soluble groups in which permutability is transitive},
     journal = {Algebra and discrete mathematics},
     pages = {10--17},
     year = {2009},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2009_4_a2/}
}