https://www.mappingthelives.org/bio/18fc1eae-351c-4fe9-9563-4154ea544fd4
https://www.joodsmonument.nl/nl/page/207084/bianca-marx-fraenkel
https://archief.amsterdam/indexen/deeds/98533401-2fcc-56a3-e053-b784100ade19?person=98533401-2fcd-56a3-e053-b784100ade19