ISBN 0231076975., p. 249. «Upytės apskritis». 2022. gada 15. dec. – caur Wikipedia. «Maršalas J.Pilsudskis lietuviukus kalbino lietuviškai». www.lrytas.lt
Real Madrid Leyendas (hyperlink for the according article in the Spanish Wikipedia), where he scored 2 times. Roberto Carlos played in 162 official matches