Multi-Pion Correlation Effects on Two-Pion Interferometry
  A general derivation of the multi-pion correlation function for completely chaotic source is given. Its effects on the pion multiplicity distribution, two-pion interferometry are studied. A generalized multi-pion correlation function for a partially coherent source is also discussed. 
Chao wei-qin, Gao chong-shou, and Zhang qing-hui