1. Akert, K Struktur und Ultrastruktur von Nervenzellen und Synapsen. Klin. Wschr. 49,509–519 (1971).
2. Akert, K, H. Moor,and K. Pfenninger Synaptic fine structure. In: Advances in Cytopharmacology (Clementi, F,and B. Ceccarelli,eds.), Vol. 1, pp. 273–290. New York: Raven Press. 1971.
3. Akert, K, K. Pfenninger,C. Sandri,and H. Moor Freeze-etching and cytochemistry of vesicles and membrane complexes in synapses of the C.N.S. In: Structure and Function of Synapses (Pappas, G. D.,and D. P. Purpura,eds.), pp. 67–86. New York: Raven Press. 1972.
4. Akert, K,and C. Sandri Identification of the active synaptic region by means of histochemical and freeze-etching techniques. In: Excitatory synaptic mechanisms (Andersen, P,and J. K. S. Jansen,eds.), pp. 27–41. Oslo: Universitetsforlaget. 1970.
5. Branton, D Fracture faces of frozen membranes. Proc. Nat. Acad. Sci. (Wash.) 55,1048–1056 (1966).