0187-7380 0187-7380 S0187-73802020000300343 10.35196/rfm.2020.3.343 Mexico Ethiopia Mexico Mexico 00 09 2020 00 09 2020 43 3 343 347

2014 2 1-3 2018 41 23-9 2012 3 701-6 2008 42 27-39 2002 4 392-7 2012 3 171-84 2017 40 309-16 2002 50 309-24 2004 21 49-55 2007 135 273-82 2013 88 118-23 2019 11 264-71 SAS Institute Inc 2011 528 1999 46 63-71 2018 7 89 2019 38 1013-6