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\bibitem{Souza_etal2020} Souza, E. V., Ferreira, M. N., Aguilar, A. C., Papavassiliou, J., Roberts, C. D., \& Xu, S. S. (2020). Pseudoscalar glueball mass: a window on three-gluon interactions. \textit{Eur. Phys. J. A}, \textit{56}(1), 25--7pp.

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