TY  - JOUR
ID  - epos1316
UR  - http://dx.doi.org/10.1785/gssrl.80.3.491
IS  - 3
A1  - Wang, Zhenming
Y1  - 2009/05//
PB  - Seismological Society of America
JF  - Seismological Research Letters
VL  - 80
SN  - 0895-0695
TI  - Comment on "Sigma: Issues, Insights, and Challenges" by F. O. Strasser, N. A. Abrahamson, and J. J. Bommer
SP  - 491
AV  - none
EP  - 493
ER  -