1. D. Počanić, in: Proc. Chiral Dynamics Workshop in Mainz, Germany, September 1997, hep-ph/9801366.
2. Pion Scattering Lengths
3. Chiral perturbation theory to one loop
4. Elastic ππ scattering to two loops
5. G. Kernel et al., Z. Phys. C 48 (1996) 210; M. Sevior et al., Phys. Rev. Lett. 66 (1993) 2569; D. Počanić et al., Rev. Lett. 72 (1993) 1156; G. Kernel et al., Phys. Lett. B 225 (1989) 198; J. Lowe et al., Phys. Rev. C 44 (1991) 956.