0379-3982 0379-3982 S0379-39822017000200087 10.18845/tm.v30i2.3200 Costa Rica 00 06 2017 00 06 2017 30 2 87 96

[1] 2004 [2] 2015 [3] 2006 1ra [4] 2008 15 40 40 37-42 [5] 2003 [6] 2015