P D Nieuwkoop

Origin and establishment of embryonic polar axes in amphibian development.

P. Nieuwkoop, P D Nieuwkoop, 1977, Current topics in developmental biology.

Inductive interactions in early amphibian development and their general nature.

P. Nieuwkoop, P D Nieuwkoop, 1985, Journal of embryology and experimental morphology.

Appendix: dialogue on embryonic induction and differentiation waves.

R. Gordon, R Gordon, N K Björklund, 1994, International review of cytology.