TY  - RPRT
TI  - Designers' unified cost model
AU  - Freeman, W.
AU  - Ilcewicz, L.
AU  - Swanson, G.
AU  - Gutowski, T.
PY  - 1992
UR  - https://ntrs.nasa.gov/citations/19950022043
ID  - 19950022043
ER  -