TY  - JOUR 
T1  - Dark Matter in the Universe
JO  - Brazilian Journal of Physics
A1  - Opher, Reuven
SN  - 0103-9733
UL  - 10.1590/S0103-97332001000200008
VL  - 31 
Y1  - 2001
PB  - Brasil 
ER  -