1. Hatching enzyme and the hatching process in the sea urchin Strongylocentrotus purpuratus;Allen,1970
2. The life history of Xenopus laevis (Daud.);Bles;Trans. Roy. Soc. Edin,1905
3. Hatching in the toad Xenopus laevis: preliminary characterization of a hatching enzyme;Carroll,1973
4. The hatching process in Xenopus laevis: identification and properties of a hatching enzyme;Carroll,1972
5. Demonstration of a hatching secretion in Rana pipiens schreber;Cooper,1936