@inproceedings{riemannian_observer_ifac2005,
author = {D.A.
Anisi and J. Hamberg },
title = {{``
Riemannian observers for Euler-Lagrange systems ''
}},
year = {2006},
booktitle= {Proceedings of the 16th IFAC World Congress},
month = {July},
address = { Prague, Czech
Republic }