http://pc.h12o.es/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3AHospital%20Universitario%2012%20de%20Octubre%2C%20and%20au%3AGuerra%20Vales%2C%20Juan%20Manuel%20and%20au%3AFern%C3%83%C2%A1ndez%20Ruiz%2C%20Mario&format=rss2 Search results for 'Provider:Hospital Universitario 12 de Octubre, and au:Guerra Vales, Juan Manuel and au:Fernández Ruiz, Mario' at 0 20