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Hua, Yingjie; Jiang, Fu-Jiun; Tiburzi, Brian C. (2008). Pion polarizabilities and volume effects in lattice QCD. Physical review. D - particles, fields, gravitation, and cosmology, 77(1), p. 14502. Melville, N.Y.: American Physical Society 10.1103/PhysRevD.77.014502