Robert F. Stengel, John R. Broussard, Paul W. Berry. Digital flight control design for a tandem-rotor helicopter. Automatica, 14(4):301-312, 1978. [doi]
@article{StengelBB78,
title = {Digital flight control design for a tandem-rotor helicopter},
author = {Robert F. Stengel and John R. Broussard and Paul W. Berry},
year = {1978},
doi = {10.1016/0005-1098(78)90030-4},
url = {http://dx.doi.org/10.1016/0005-1098(78)90030-4},
researchr = {https://researchr.org/publication/StengelBB78},
cites = {0},
citedby = {0},
journal = {Automatica},
volume = {14},
number = {4},
pages = {301-312},
}