1982-7806 1982-7806 S1982-78062015000300941 10.14393/che-v14n3-2015-941 Brasil Brasil 00 09 2015 00 09 2015 14 3 941 959

2011 231-46 2011 5-30 2005 1989 2011 2002 21 21 90-103 1997 18 18 203-24 2011 461-3 2009 2000 2 2 99-133