Links
edit- Obit. in Developmental Biology: [1]
- 70th Birthday interview in Development: [2]
- Article contains a paragraph on page 5 about Nieuwkoop's contributions to Xenopus biology [3]
- History of the Hubrecht Institute where Nieuwkoop was a director [4]
- A short article on his work [5]
- He won the Ross Harrison prize in 1993 [6]