Bibliografia
- http://www.google.com.mx/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CDQQFjAB&url=http%3A%2F%2Ffiles.lasticdelfuturo.webnode.es%2F200000005-2cd272dcbd%2FEL-MICROINJERTO.pdf&ei=elWxUPLsLsP02gWn4YDICA&usg=AFQjCNHD4zehIL2xlFlHOU5spI9ToM7kVw&sig2=PMmDlcIxRcKYzjCrSinhBg
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