1. W. E. L. Clark, J. Anat.80, 24 (1946).
2. H. Betz, Archs Anat. microsc.40, 46 (1951).
3. L. A. Peer,Transplantation of Tissues (The Williams and Wolkins Comp., Baltimore 1955), p. 347.
4. A. Studitsky, R. Zhenevskaya andO. Rumyantseva, inThe Effect of Use and Disuse on Neuromuscular Functions (Eds.E. Gutmann andP. Hnìk; Elsevier, Amsterdam 1963), p. 71.
5. C. Tal andE. Liban, Br. J. exp. Path.43, 525 (1962).