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- [26] UNITARITY CONDITION + CONNECTIONS BETWEEN PION-PION + PION-NUCLEON SCATTERING NUOVO CIMENTO, 1964, 31 (02): : 360 - +
- [28] REMARKS ON PION PRODUCTION IN PION-NUCLEON COLLISIONS AT MODERATE ENERGIES PHYSICAL REVIEW, 1958, 111 (06): : 1651 - 1657
- [29] THE EFFECT OF PION-PION INTERACTION TO THE PION-NUCLEON SMALL P-WAVE PHASE SHIFTS PROGRESS OF THEORETICAL PHYSICS, 1961, 25 (02): : 294 - 296