BibTex format
@article{Hamzi:2015:10.1007/s10883-014-9264-1,
author = {Hamzi, B and Lamb, JSW and Lewis, D},
doi = {10.1007/s10883-014-9264-1},
journal = {JOURNAL OF DYNAMICAL AND CONTROL SYSTEMS},
pages = {273--284},
title = {A Characterization of Normal Forms for Control Systems},
url = {http://dx.doi.org/10.1007/s10883-014-9264-1},
volume = {21},
year = {2015}
}