TY  - RPRT
TI  - Optimal model reduction and frequency-weighted extension
AU  - Spanos, J. T.
AU  - Milman, M. H.
AU  - Mingori, D. L.
PY  - 1990
UR  - https://ntrs.nasa.gov/citations/19900060550
ID  - 19900060550
ER  -