Betchaku T, Trinkaus JP (December 1978). "Contact relations, surface activity, and cortical microfilaments of marginal cells of the enveloping layer and of the yolk syncytial and yolk cytoplasmic layers of fundulus before and during epiboly". J. Exp. Zool. 206 (3): 381–426. doi:10.1002/jez.1402060310. PMID568653.
Betchaku T, Trinkaus JP (December 1978). "Contact relations, surface activity, and cortical microfilaments of marginal cells of the enveloping layer and of the yolk syncytial and yolk cytoplasmic layers of fundulus before and during epiboly". J. Exp. Zool. 206 (3): 381–426. doi:10.1002/jez.1402060310. PMID568653.