0034-7426 0034-7426 S0034-74262017000100043 10.15446/recolma.v51n1.66834 Colombia 00 06 2017 00 06 2017 51 1 43 56

[1] 1986 47 1-5 [2] 1962 689 199-201 [3] 1983 [4] 2010 [5] 1969 20 3 3 235-40 [6] 1940 8 50 50 405-22 [7] 1972 64 105-14 [8] 2016 [9] 1983 117 109-46