References
- Hough, P. V. C. and Powell, B. W. Nuovo Cimenta, 18, 1184 (1960).
- Many papers on the problems mentioned in this outline can he found in (a) Proceedings of the International Conference on High Energy Accelerators and Instrumentation, CERN 1959 (b) Proceedings of the International Conference on Instrumental lion for High Energy Physics, Berkeley. California, Intel science 1961.