On 25 january 1943 a 'Wirtschaftsreferent' wrote a letter to the Jewish Council, in which he revoked the permit of the business of the Sternefeld family. It was a pastry shop and not a bakery as was thought before. The letter is depicted in: H. Wielek, De oorlog die Hitler won (Amsterdam 1947) 204
In addition, a Jokos file (number 52998) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.