1. The fine structure of the sea urchin spermatozoa as revealed by the electron microscope;Afzelius;Z. Zellforsch. u. mikroskop. Anat.,1955
2. Electron microscopy of the sperm tail;Afzelius;J. Biophys. Biochem. Cytol.,1959
3. Die Elementarorganismen und ihre Beziehungen zu den Zellen, Leipzig;Altmann,1890
4. Histogénèse et structure de la glande hermaphrodite d'Helix pomatia L.;Ancel;Arch. Biol. Liége,1903
5. The ultrastructure of the human spermatozoon, Göteborg;nberg,1957