1. WASH. 1968. 1109
2. Cecchini, G., Farinelli, U.Gandini, A. 1964.3rd Geneva Conf.P/627
3. Humi, M., Wagschal, J. J. and Yeivin, Y.ibid.P/668
4. Pazy, A., Rakavy, G.Reiss, Y. 1966.ANL-7320270–277.
5. Hemment, P. C.E. and Pendlebury, E. D.ibid.88–106.