Integrability from point symmetries in a family of cosmological Horndeski Lagrangians N. Dimakis, Alex Giacomini and Andronikos Paliathanasis Eur. Phys. J. C, 77 7 (2017) 458 Published online: 10 July 2017 DOI: 10.1140/epjc/s10052-017-5029-9