0187-5779
0187-5779
S0187-57792012000400315
00
12
2012
00
12
2012
30
4
315
326
[
1993
46
213-22
]
[
1999
69
30-42
]
[
1998
66
286-97
]
[
1998
]
[
1977
]
[
1994
]
[
1985
17
35-53
]
[
1990
34
75-91
]
[
1997
88
215-39
]
[
1994
49
105-17
]
[
1994
49
93-104
]
[
2006
40
613-26
]
[
2003
46-51
]
[
2005
39
293-301
]
[
2006
40
99-108
]
[
2009
43
417-25
]
[
2009
24
69-80
]
[
1985
18
147-61
]
[
1972
2
71-81
]
[
1981
]
[
2002
84
143-59
]
[
1987
21
311-32
]
[
2008
42
193-204
]