Rafael León J. Javier Rainer José Manuel Rojo Ramón Galán Improving Web Learning through model Optimization using Bootstrap for a Tour-Guide Robot. 13-19 2012 1 Int. J. Interact. Multim. Artif. Intell. 6 https://doi.org/10.9781/ijimai.2012.162 db/journals/ijimai/ijimai1.html#LeonRRG12