1. Proprietà di immersione dei sottogruppi modulari localmente ciclici nei gruppi;Busetto;Rend. Semin. Mat. Univ. Padova,1980
2. On some questions concerning permutable subgroups of finitely generated groups and projectivities of perfect groups;Busetto;Rend. Semin. Mat. Univ. Padova,1992
3. The Maier–Schmid problem for infinite groups;Celentani;J. Algebra,2006
4. Subnormal Subgroups of Groups;Lennox,1987
5. The embedding of quasinormal subgroups in finite groups;Maier;Math. Z.,1973