TY  - RPRT
TI  - Sub-optimal closed-loop control of nonlinear systems using invariant imbedding techniques.
AU  - Melsa, J. L.
AU  - Steinway, W. J.
PY  - 1969
UR  - https://ntrs.nasa.gov/citations/19690056689
ID  - 19690056689
ER  -