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4. M. A. Raifeld and A. A. Spektor, “Nonparametric Method for Detecting Signals from Seismically Active Objects,” Avtometriya 41(6), 88–97 (2005) [Optoelectr., Instrum. Data Process. 41 (6), 73–80 (2005)].
5. A. L. Markhakshinov and A. A. Spektor, “Estimating Local Characteristics of Object Motion in a Seismic Monitoring System,” Avtometriya 45(5), 48–53 (2009) [Optoelectr., Instrum. Data Process. 45 (5) 419–423 (2009)].