1. 5) IWAN W. D. Some Observations on Strong-motion Earthquake Measurement using a Digital Accelerograph. Bulletin of the Seismological Society of America. (1985) vol.75, p.1255-1246.
2. 6) BERG G. V. Integrated velocity and displacement of strong earthquake ground motion. Bulletin of the Seismological Society of America. (1961) vol.51, no.2, p.175-189.
3. 8) BOORE David M. Comments on baseline correction of digital strong-motion data : Examples from the 1999 Hector Mine, California, earthquake. BSSA. (2001) vol.1.3,
4. 12) BOORE David M. Effect of baseline corrections on displacements and response spectra for several recordings of the 1999 Chi-Chi, Taiwan, Earthquake. BSSA. (2001) vol.V1.2:6, p.1-29.