Maximum mass and universal relations of rotating relativistic hybrid hadron-quark stars Gabriele Bozzola, Pedro L. Espino, Collin D. Lewin and Vasileios Paschalidis Eur. Phys. J. A, 55 9 (2019) 149 Published online: 16 September 2019 DOI: 10.1140/epja/i2019-12831-2