@inproceedings{zhang2017hopf_pda,
    title={Hopf Bifurcation in a Nonlinear Mechanical Model of Human Balancing with Delayed PDA Control},
    author={Zhang, Li and Stepan, Gabor and Insperger, Tamas},
    booktitle={The 9th European Nonlinear Dynamics Conference (ENOC 2017)},
    pages={1--2},
    year={2017},
    month={June, 25 -- 30},
    address = {Budapest, Hungary},
    ISBN = {978-963-12-9168-1}
}