Martín-Sierra, Ana, et al. “Walking Capacity Is Associated With Health Related Quality of Life and Physical Activity Level in Patients With Schizophrenia: A Preliminary Report”. Actas Españolas De Psiquiatría, vol. 39, no. 4, July 2011, pp. 211-6, https://actaspsiquiatria.es/index.php/actas/article/view/526.