1. Elementary processes at high energy;Alles-Borelli,1970
2. XV Intern. Conf. on High-energy physics,1970
3. V.E. Balakin et al., Measurement of π± and K± pair production cross sections with the colliding beams at the energy of 1180–1340 MeV, Preprint;
4. Hadron production by e+e− colliding beams in the GeV region (2E = 1.4−2.4 GeV);Borgia;L.N.F. 71/62,1971
5. A full description of the apparatus can be found in V. Alles-Borelli et al., An experimental set-up to study charged final states from the e+e− interaction, to be published. The apparatus has already been described briefly in ref. [1]. See also refs. [4,5].