J.W. Howse, L.O. Ticknor, and K.R. Muske,

<B> Least Squares Estimation Techniques for Position Tracking of Radioactive
    Sources</B>.

Automatica, Vol. 37, No. 11, pp. 1727-1737, 2001.
Los Alamos National Laboratory Technical Report LA-UR-99-0917.

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<A HREF="/~kelly/ml/pubs/2001_postrack/abstract.shtml"> Abstract </A>
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<A HREF="/~kelly/ml/pubs/2001_postrack/paper.pdf"> PDF        (421 KB) </A>
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