Bases of certain finite groups Raffaele Scapellato, Libero Verardi (1994) Annales mathématiques Blaise Pascal
Blocks, solvable permutation groups, and Landau's theorem. Burkhard Külshammer (1989) Journal für die reine und angewandte Mathematik
Blocks with Dihedral Defect Groups in Solvable Groups. Gerhard O. Michler, Karin Erdmann (1977) Mathematische Zeitschrift