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2. Ultrastructural and quantitative studies of thymic cysts in developing cockerels;Casey;Proc. Can. Fed. Biol. Soc.,1975
3. Ultrastructure of the ultimo-branchial gland of the laying chicken;Chan;Okajimas Folia Anat. Jpn.,1982
4. Cytological evidence of secretion in the thymus;Clark,1966
5. Incorporation of sulfate by the mouse thymus;Clark;Its relation to secretion by medullary epithelial cells and to thymic lymphopoiesis. J. Exp. Med.,1968