TY  - RPRT
TI  - Aeroelastic analysis for helicopter rotor blades with time-variable, non-linear structural twist and multiple structural redundancy: Mathematical derivation and program user's manual
AU  - Bielawa, R. L.
PY  - 1976
UR  - https://ntrs.nasa.gov/citations/19770003613
ID  - 19770003613
ER  -