1983-9278 1983-9278 S1983-92782019000400200 10.5585/eccos.n51.16272 00 00 2019 00 00 2019 51 2015 Extr 12 12 2010 31 113 113 1223-45 2009 29 78 78 201-15 1987 37 2009 29 78 78 216-26