https://www.annefrank.org/annes-wereld/nl/peter-van-pels/1926-peter-van-pels-wordt-geboren/1926-peter-van-pels-wordt-geboren
Peter van Pels – Wikipedia
Peter „Van Daan“ van Pels (1926 - 1945) - Genealogy (geni.com)
Peter van Pels | Anne Frank Haus
https://archief.amsterdam/indexen/deeds/985333fa-62ad-56a3-e053-b784100ade19?person=985333fa-62ae-56a3-e053-b784100ade19
https://www.mappingthelives.org/bio/e2074fd1-19df-4d8c-b49f-2662e7ae1f9b