TY  - RPRT
TI  - Practical optimal flight control system design for helicopter aircraft. Volume 1: Technical Report
AU  - Hofmann, L. G.
AU  - Riedel, S. A.
AU  - Mcruer, D.
PY  - 1980
UR  - https://ntrs.nasa.gov/citations/19800014839
ID  - 19800014839
ER  -