Complements, baseless subgroups and sylow subgroups of infinite wreath products B. Hartley — 1973 Compositio Mathematica
Injektoren endlicher auflösbarer Gruppen. W. Gaschütz; B. Fischer; B. Hartley — 1967 Mathematische Zeitschrift
Carter subgroups and injectors in a class of locally finite groups B. Hartley; M. J. Tomkinson — 1988 Rendiconti del Seminario Matematico della Università di Padova