https://www.joodsmonument.nl/nl/page/194104/heinz-tugendreich
https://www.oorlogsbronnen.nl/tijdlijn/43a0c3f7-1ba6-4ce0-bf0e-d64dd87b4f11
https://mappingthelives.org/bio/15177056-c3f0-464d-8864-12ea833ca3fe?language=en
https://archief.amsterdam/indexen/deeds/98533412-a965-56a3-e053-b784100ade19?person=98533412-a966-56a3-e053-b784100ade19