0379-3982 0379-3982 S0379-39822018000100003 10.18845/tm.v31i1.3493 Costa Rica 00 03 2018 00 03 2018 31 1 3 21

[1] 2010 23 1 1 47-62 [2] 2008 21 4 4 102-25 [3] 2016 [4] 1999 [5] 2005 2 1645-50 [6] 2014 627-51 [7 ] 2012 [8] 2008 [9] 2005 41 923-37 [10] 2007 4 1 1 31-9