Blackburn recruit Rochina and Formica
Former Argentina youth player Formica, nicknamed The Cat, completed a deal that will keep him at Ewood Park until 2014, the club said on Monday.
"Mauro is a fantastic talent, an attacking player who has been in great demand," Rovers manager Steve Kean told the club's website. "He has great technical ability and is a typical Argentinian with a bit of fight and devilment."
Rochina, 19, has signed a deal until 2015 and will initially join up with the club's elite development programme.