1. Afzelius, B.A.: Electron microscopy of the sperm tail. Results obtained with a new fixative. J. biophys. biochem. Cytol. 5, 269?278 (1959)
2. Afzelius, B.A.: Fine structure of the spermatozoon of Tubularia larynx (Hydrozoa, Coelenterata). J. Ultrastruct. Res. 37, 678?689 (1971)
3. Anderson, W.A.: Cytochemistry of sea urchin gametes. II. Ruthenium red staining of gamete membranes of sea urchins. J. Ultrastruct. Res. 24, 322?333 (1968)
4. Anderson, W.A.: Methods for electron microscopic localisation of glycogen. Tech. Biochem. Biophys. Morphol. 1, 1?23 (1972)
5. Anderson, W.A., Personne, P.: The fine structure of the neck region of spermatozoa of Helix aspersa. J. Microscopie 6, 1033?1042 (1967)