1. Differentiation of cells of the Rana pipiens gastrula in unconditioned medium;Barth;J. Embryol. Exp. Morphol,1959
2. The appearance and distribution of intermediate filament proteins during differentiation of the central nervous system, skin and notochord of Xenopus laevis;Godsave;J. Embryol. Exp. Morphol,1986
3. Mesoderm inducing factors: A small class of molecules;Godsave;Development,1988
4. A community effect in animal development;Gurdon;Nature (London),1988
5. Neural differentiation of ectoderm through exposure to saline solution;Holtfreter;J. Exp. Zool,1944