0120-5633 0120-5633 S0120-56332018000100081 10.1016/j.rccar.2017.02.005 Colombia Colombia 00 02 2018 00 02 2018 25 1 81 81

1 2012 33 485-99 2. 2011 49 969-96 3. 2015 23 293-307 4 2014 52 155-81 5 2013 51 555-82 6 2010 122 1159-66 7 2011 68 451-4 8 2005 4 606-8