Alexei G. Kushner, Valentin V. Lychagin. Petrov invariants of Hamiltonian systems with a control parameter. Automation and Remote Control, 74(3):385-400, 2013. [doi]
@article{KushnerL13,
title = {Petrov invariants of Hamiltonian systems with a control parameter},
author = {Alexei G. Kushner and Valentin V. Lychagin},
year = {2013},
doi = {10.1134/S0005117913030053},
url = {https://doi.org/10.1134/S0005117913030053},
researchr = {https://researchr.org/publication/KushnerL13},
cites = {0},
citedby = {0},
journal = {Automation and Remote Control},
volume = {74},
number = {3},
pages = {385-400},
}