0379-3982 0379-3982 S0379-39822018000300143 10.18845/tm.v31i3.3909 Costa Rica Costa Rica 00 09 2018 00 09 2018 31 3 143 150

(1) (2) 2011 (3) 2015 (4) 2012 18-31 (5) 2014