Perspect. ciênc. inf. vol.16 número4

! " #$%" #&" #$" #' (# )*$$

+ $%" , &

! - ." " " " /

" /

0 ! 1 #

, ! 0 $&

2 " 3 4 0 !

0 0 ,0 " ! 0

" 0 0 5 +

! " 1 " 5

0 ! ! "

6 "

! , " ! ! (

" ! ! 7 " 0

0 1 /

,0 " 0 7 ! / 1

7 0 + 8 / ,0

6! # 9 6 ! " 5

0 0 5 0 $:

! #

; ! 9<

< 1 + ! + "

8 4" / ! =

8 4" ( 4 1 " /

0 / > ? !

1 / + #

9 " ! @

/ 6 0 ! +

! " < " 8 2"

07 +A 0 ! 1 # "

1

/ 0 6 #

8 7 4

)*$) ( / 0 >

! 0 < #

Boa leitura!