Studies of gluon TMDs and their evolution using quarkonium-pair production at the LHC Florent Scarpa, Daniël Boer, Miguel G. Echevarria, Jean-Philippe Lansberg, Cristian Pisano and Marc Schlegel Eur. Phys. J. C, 80 2 (2020) 87 Published online: 04 February 2020 DOI: 10.1140/epjc/s10052-020-7619-1