http://www.google.com/patents?id=UvpLAAAAEBAJ&prin tsec=abstract&zoom=4#v=onepage&q&f=false
precti si tento link ak umis anglicky
http://www.google.com/patents?id=UvpLAAAAEBAJ&prin tsec=abstract&zoom=4#v=onepage&q&f=false
precti si tento link ak umis anglicky