Ball, P., Braun, V., & Kivel, N. (2003). Photon distribution amplitudes in QCD. Nuclear Physics B, 649(1/2), 263. https://doi.org/10.1016/S0550-3213(02)01017-9
Chicago Style (17th ed.) CitationBall, Patricia, V.M Braun, and N. Kivel. "Photon Distribution Amplitudes in QCD." Nuclear Physics B 649, no. 1/2 (2003): 263. https://doi.org/10.1016/S0550-3213(02)01017-9.
MLA (9th ed.) CitationBall, Patricia, et al. "Photon Distribution Amplitudes in QCD." Nuclear Physics B, vol. 649, no. 1/2, 2003, p. 263, https://doi.org/10.1016/S0550-3213(02)01017-9.
Warning: These citations may not always be 100% accurate.