%0 Journal Article %@ 0895-0695 %A Wang, Zhenming %A Kentucky Geological Survey 228 Mining and Mineral Resources Building University of Kentucky Lexington, Kentucky 40506 U.S.A., %D 2009 %F epos:1316 %I Seismological Society of America %J Seismological Research Letters %N 3 %P 491-493 %T Comment on "Sigma: Issues, Insights, and Challenges" by F. O. Strasser, N. A. Abrahamson, and J. J. Bommer %U https://episodesplatform.eu/eprints/1316/ %V 80