@article{10_4153_CMB_1976_033_5,
     author = {Tomkinson, M. J.},
     title = {Cover-Avoidance {Properties} in {Finite} {Soluble} {Groups}},
     journal = {Canadian mathematical bulletin},
     pages = {213--216},
     year = {1976},
     volume = {19},
     number = {2},
     doi = {10.4153/CMB-1976-033-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1976-033-5/}
}