Aaij, R., Beteta, C. A., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., . . . Zucchelli, S. (2020). Measurement of $${\psi {(2S)}} $$ ψ(2S) production cross-sections in proton-proton collisions at $$\sqrt{s} =7$$ s=7 and $$13\text { TeV} $$ 13TeV. European Physical Journal C: Particles and Fields, 80(3), 1-23. https://doi.org/10.1140/epjc/s10052-020-7638-y

Aaij, R., et al. "Measurement of $${\psi {(2S)}} $$ ψ(2S) Production Cross-sections in Proton-proton Collisions at $$\sqrt{s} =7$$ S=7 and $$13\text { TeV} $$ 13TeV." European Physical Journal C: Particles and Fields 80, no. 3 (2020): 1-23. https://doi.org/10.1140/epjc/s10052-020-7638-y.

Aaij, R., et al. "Measurement of $${\psi {(2S)}} $$ ψ(2S) Production Cross-sections in Proton-proton Collisions at $$\sqrt{s} =7$$ S=7 and $$13\text { TeV} $$ 13TeV." European Physical Journal C: Particles and Fields, vol. 80, no. 3, 2020, pp. 1-23, https://doi.org/10.1140/epjc/s10052-020-7638-y.