1. R. A. Eisenstein etal. (JETSET Collaboration), Proc. BNL Workshop on Glueballs, Hybrids and Exotic Hadrons, Upton (New York), 1988, ed. S.-U. Chung (AIP Conference Proceedings No. 185, American Institute of Physics, New York, 1989 ) p. 636.
2. D. W. Hertzog etal. (JETSET Collaboration), Proc. 3rd Conference on the Intersections between Particle and Nuclear Physics, Rockport (Maine), 1988, ed. G.M. Bunce (AIP Conference Proceedings No. 176, American Institute of Physics, New York, 1988 ) p. 334.
3. Particle Data Group, Phys. Lett. 204B (1988) 1.
4. S. Baird etal., Proc. 4th Workshop on Physics with Low-Energy Antiprotons, Villars-sur-Ollon, 1987, eds. C. Amsler etal. ( Harwood Academic Publishers, Chur, 1988 ) p. 91.
5. P. Lefèvxe, Proc. International School of Physics with Low-Energy Antiprotons on Antiproton-Nuclèon and Antiproton-Nucleus Interactions, Erice, 1988, eds. F. Bradamante etal. (Plenum Press, New York, 1990).