1. “Abraham Trembley of Geneva, Scientist and Philosopher, 1710–1784”;Baker,1952
2. “Humoral Control of Growth and Differentiation, Vol. II Nonvertebrate Neuroendocrinology and Aging”;Bode,1973
3. Regulation of a multipotent stem cell, the interstitial cell of hydra
4. Quantitative analysis of cell types during growth and morphogenesis in Hydra