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2. ISR:G. Flugge, Ch. Gottfried, G. Neuhofer, F. Niebergall, M. Regler, W. Schmidt-Parzefall, K. R. Schubert, P. E. Schumacker andK. Winter: CERN Report (August 1972), submitted to theXVI International Conference on High–Energy Physics, Batavia, 1972.
3. M. Jacob: report at theXVI International Conference on High–Energy Physics, Batavia, 1972.
4. E. Malamud et al.: contribution to theXVI International Conference on High-Energy Physics, Batavia, 1972, quoted in ref. (3)M. Jacob: report at theXVI International Conference on High-Energy Physics, Batavia, 1972.
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