0102-5473 0102-5473 S0102-54732014000200497 10.5007/2175-795X.2014v32n2p497 Spain Spain Spain 00 08 2014 00 08 2014 32 2 497 519

3 99 99 478-513 1 1 8-12 27 76 76 45-63 5 141-80 1 27 27 59-96 220 50-4 277 277 43-53 285 285 77-92 1 15 15 101-12