Origin and function of the yolk sac in primate embryogenesis | Nature Communications
The Anatomy and Pathology of the Lesser SAC: Implications for Peritoneal Dialysis - Badri M. Shrestha, Peter W.G. Brown, Martin E. Wilkie, Andrew T. Raftery, 2010
Claudin expression in the rat endolymphatic duct and sac - first insights into regulation of the paracellular barrier by vasopressin | Scientific Reports