Why this year's World Cup soccer ball may fly more predictably than the 2010 dud - The Washington Post
a) The seven FIFA official match balls and two generic balls used for
Adidas Brazuca Ball - How Does it Perform? - Soccer Cleats 101
Peering Inside the World Cup's Brazuca Ball
World Cup balls: Al Rihla, Tango, Jabulani & the complete history of official matchballs
Soccer Blog Why the Brazuca is going to be much better than the Jabulani
New World Cup ball 'Brazuca' unveiled to honour Brazil
Brazil 2014: Can the Brazuca pump up the deflated World Cup football?
Brazil 2014: Can the Brazuca pump up the deflated World Cup football?
The science of the 2014 World Cup soccer ball - Design Engineering
World Cup ball – DW – 06/09/2010
Study shows Brazuca is better than Jabulani