1. Speculations on Cosmogony
2. Observation of Antiprotons
3. Evidence for the Existence of Cosmic-Ray Antiprotons
4. E.A. Bogomolov et al., A stratospheric magnetic spectrometer investigation of the singly charged component spectra and composition of the primary and secondary cosmic radiation, Proceedings of 16th ICRC, Vol. 1, Tokyo, Japan, 1979, p. 330.
5. S.A. Stephens, Propagation of cosmic ray nuclei, electrons and antiprotons, Rapporteur Talk, Proceedings of 17th ICRC, Vol. 13, Paris, France, 1981, p. 89.