TY  - JOUR 
T1  - Ultrasound attenuation and collective modes in mixed d x2-y2 + id xy state of unconventional superconductors
JO  - Brazilian Journal of Physics
A1  - Brusov, Peter
A1  - Brusov, Paul
A1  - Majumdar, Pinaki
A1  - Orehova, Natali
SN  - 0103-9733
UL  - 10.1590/S0103-97332003000400018
VL  - 33 
Y1  - 2003
PB  - Brasil 
ER  -