In addition, a Jokos file (number 6493) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 12283/5617).
Some articles on the Vlessing family:
P. Kleverlaan, in: Toendertoid. Stichting Waarland van Toen, no. 6, May 1995.
J. de Baar, in: Alkmaarsche Courant, 29 April 2008