References www.oceansiderevolution.com/EINSTEIN.htm www.eastbay.com thestore.adidas.com usarious.lycos.es/rcarlospage/robertoimagenes.htm www.kent.k12.wa.us/staff/trobinso/physicspages/PO2001/soccer www.yrl.co.uk/~gonzalo/rm/plantilla/roberto_carlos4.jpg www.fi.edu/qa98/spotlight6/spotlight6.html rucus.ru.ac.za/~scifest/2001/webpage/images Physics: for Scientists and Engineers. Thomson Learning Inc., 2000.  pgs. 82, 474.