1. Historical introduction: concepts of the trophoblast and of its role in placentation;Steven,1983
2. Lectures on the comparative anatomy of the placenta;Turner,1876
3. On the origin of species. Facsimile of the first edition (1859), with an introduction by Ernst Mayr;Darwin,1981
4. Ambrosius Arnold Willem Hubrecht;Palm,1999
5. A brief history of the Hubrecht laboratory;Faasse;Int J Dev Biol,1999