Kashevarov, V. ., Ott, P. ., Prakhov, S. ., Adlarson, P. ., Afzal, F. ., Ahmed, Z. ., … at, M. A. C. (2017). Study of η and η’ Photoproduction at MAMI. Physical Review Letters, 118(21), 212001. https://doi.org/10.1103/PhysRevLett.118.212001 (Original work published 2017)