Spoerer, M. «Recent Findings on Forced Labor under the Nazi Regime and an Agenda for Future Research». Annali dell’Istituto Storico Italo-Germanico in Trento = Jahrbuch Des Italienisch-Deutschen Historischen Instituts in Trient, vol. 28, gennaio 2002, pagg. 373-88, https://heyjoe.fbk.eu/index.php/anisig/article/view/3499.