1. Investigaciones histologicas é histopathologicas sobre la glándula pineal humana.;Achúcarro;Trab. Lab. Invest. Biol. Univ. Madrid,1912
2. Electron microscopy of the bursa of Fabricius of the embryonic chick with particular reference to the lympho-epithelial nodule.;Ackerman;J. Cell Biol.,1962
3. Über die Fettumsetzungen im Organismus.;Altmann;Arch. Anat. Physiol., Anat. Abt.,1889
4. Some cytological observations on the fine structure of a mammalian pineal organ.;Anderson;Anat. Rec.,1960
5. Some fine structural features of the pineal body.;Anderson;Amer. Zool.,1962