Neutral Associated Production by 8-, 10.7-, and 15.7−GeVc π− Incident on ProtonsRemoveK. J. Foley, W. A. Love, S. Ozaki, E. D. Platner, A. C. Saulys, E. H. Willen, and S. J. LindenbaumPhys. Rev. D 8, 27 (1973)