>
<a href="https://doi.org/10.1016/0022-2364(87)90023-0">Barkhuijsen, H.; 
De Beer, R.; Van Ormondt, D.; J. Mag. Reson. 73 (1987), 553</a>
<li>
<a href="https://doi.org/10.1006/jmra.1994.1209">Van Huffel, S.;Chen, H.; 
Decanniere, C.; Van Hecke, P.; J. Mag. Reson., Series A 110 (1994), 228</a>
<li>
<a href="https://doi.org/10.1109/TASSP.1985.1164557">Wax, M.; Kailath, T.; 
IEEE Trans. Acoust. Speech Signal ASSP-39 387 (1985)</a>
</ul>
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