TY - CHAP T1 - Covariance equivalent forms and evolutionary spectra for nonstationary random processes T2 - Analysis and Optimization of Systems PY - 1984/02/02 AU - Hammond JK AU - Harrison RF ED - DO - DOI: 10.1007/bfb0004940 PB - Springer-Verlag SP - 1 EP - 14 Y2 - 2025/06/23 ER -