2077-3323 2077-3323 S2077-33232021000200158 10.35319/rcyc.2021471257 Bolivia 00 12 2021 00 12 2021 25 47 158 173 1 2018 2 1992 3 1994 28 59-115 4 2015 12 23 23 71-88 5 2004 6 2007 7 2015 8 2015 265-79 9 2015