Citation: Gimeno, Ignacio; Urtizberea, Ainhoa; Rom\'an-Roche, Juan; Zueco, David; Cam\'on, Agust\'in; Alonso, Pablo J.; Roubeau, Olivier; Luis, Fernando (2021). Broad-band spectroscopy of a vanadyl porphyrin: a model electronuclear spin qudit. Chemical Science, 12, pp. 5621-5630.