1692-1798 1692-1798 S1692-17982021000200141 10.15332/iteckne.v18i2.2559 Ecuador Ecuador 00 12 2021 00 12 2021 18 2 141 149

[1] 1937 56 2 2 261-82 [2] I. J. T. F. on S. T. and Definitions 2004 19 2 2 1387-400 [3] 2015 1 Xc Xc [4] 2018 33 2 2 1184-94 [5] 2012 53 9 9 [6] 2014 29 2 2 518-24 [7] 2017 141 418-22 [8] 2020 11 3 3 2040-8 [9] 2017 2da [10] 1926 45 51-94 [11] 2013 53 9 9 1689-99 [12] 2011 2 4, 4, 715723 [13] 1979 PAS-98 2 2 573-84 [14] 1997 12 3 3 1210-9 [15] 2012 11 [16] 2013 9 9 36-41 [17] 2019 393-6 [18] 2014 727-32 [19] 1966 113 3 3 506 [20] 2000 9 1 1 130-41 [21] [22] 2011 1 14 [23] 1997 25 2 2 169-80 [24] 2013 1374-7 [25] 2013 [26] 1979 2 2 606-17 [27] 10 [28] 1985 15