1405-0471 1405-0471 S1405-04712017000200155 10.21829/myb.2017.232968 Brazil Brazil Brazil 00 00 2017 00 00 2017 23 2 155 162

2006 16 1 1 17-26 American Society for Testing Materials 2005 2009 63 6 6 767-72 2009 32 8 8 1-5 2013 4 1 1 108-17 1993 2014 21 3 3 409-16 Instituto Brasileiro de geografia e estatística 2016 1998 273-307 2000 1986 01 1 -6 2013 19 4 4 551-7 2014 20 1 1 105-12 2005 2013 4 1 1 15-32 2013 93 2 2 408-14