@inbook{inbook8a9a4ed1,
title   = {Nonlinear observers: a state-of-the-art survey},
author = {Misawa, Eduardo A. and Hedrick, J K},
year = {1988},
publisher = {Asme},
journal   = {Recent Advances in Control of Nonlinear and Distributed Parameter Systems, Robust Control and Aerospace Control Applications}
}