TY  - JOUR 
T1  - Light Absorption near Threshold with Phonon Participation for Impurities in Semiconductors
JO  - Revista Brasileira de Ensino de Física
A1  - Amato, M. A.
SN  - 1806-1117
UL  - 10.1590/S1806-11172002000400003
VL  - 24 
Y1  - 2002
PB  - Brazil 
ER  -