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@MISC{sena_patente2009,
        author = {Gonzalez-Jimenez, Javier and Muñoz, Antonio and Fernández-Madrigal, Juan-Antonio and Galindo, Cipriano and Blanco, José-Luis and Arevalo-Espejo, Vicente},
         month = {{{feb}}},
         title = {Silla de ruedas robotizada con capacidad operativa autónoma (in Spanish)},
          year = {2009},
  howpublished = {ES2296542 B2},
           url = {invenes.oepm.es/InvenesWeb/detalle?referencia=P200602571}
}