BibTex format
@article{Astolfi:2003:10.1109/TAC.2003.809820,
author = {Astolfi, A and Ortega, R},
doi = {10.1109/TAC.2003.809820},
journal = {IEEE TRANSACTIONS ON AUTOMATIC CONTROL},
pages = {590--606},
title = {Immersion and invariance: A new tool for stabilization and adaptive control of nonlinear systems},
url = {http://dx.doi.org/10.1109/TAC.2003.809820},
volume = {48},
year = {2003}
}