D. Sánchez-Teruel, M.-A. Robles-Bello, and J.-A. Camacho-Conde, “Validity of the spanish version of the Herth Hope Index and The Beck Hopelessness Scale in people who have attempted suicide”, Actas Esp Psiquiatr, vol. 48, no. 4, pp. 163–168, Jul. 2020.