Frank Bajohr, «The «Aryanization» of Jewish Companies and German Society: The Example of Hamburg», in Bankier (ed.), Probing, 226-45, 227-34. О традиционных коммерческих обычаях см. в Richard J. Evans, Death in Hamburg: Society and Politics in the Cholera Years 1830 — 1910 (Oxford, 1987), 33-9, 392-4; и Niall Ferguson, Paper and Iron: Hamburg Business and German Politics in the Era of Inflation 1897 — 1927 (Cambridge, 1995), 60-64.