Journal of Physics G Nuclear Physics Journal of Physics G Nuclear Physics, 2014, 41, pp.115002. ⟨10.1088/0954-3899/41/11/115002⟩ Journal of Physics G Nuclear Physics, Institute of Physics (IOP), 2014, 41, pp.115002. ⟨10.1088/0954-3899/41/11/115002⟩ Journal of Physics G-Nuclear and Particle Physics, 41(11):115002. IOP Publishing Ltd. Journal of Physics. G: Nuclear and Particle Physics, 41(11):115002. IOP PUBLISHING LTD J. Phys. G LHCb Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Ruiz Valls, Pablo Sánchez Mayordomo, Carlos 2014 Observation of charmonium pairs produced exclusively in pp collisions Journal of Physics G-Nuclear and Particle Physics 41 11 115002-1 115002-17 RODERIC. Repositorio Institucional de la Universitat de Valéncia instname Aaij, R, Ali, S, van den Brand, J F J, De Bruyn, K, Farinelli, C, Heijne, V A M, Ketel, T J, Koopman, R F, Kozlinskiy, A, van Leerdam, J, Merk, M H M, Oggero, S, Pellegrino, A, Raven, H G, Snoek, H, Syropoulos, V, David, P N Y, Tolk, S & LHCb, C 2014, ' Observation of charmonium pairs produced exclusively in pp collisions ', Journal of Physics G. Nuclear and Particle Physics, vol. 41, no. 11, UNSP 115002 . https://doi.org/10.1088/0954-3899/41/11/115002 Journal of Physics G: Nuclear and Particle Physics Journal of Physics G. Nuclear and Particle Physics, 41(11):UNSP 115002. IOP Publishing Ltd.