2001 journal article
Numerically constructible observers for linear time-varying descriptor systems
Automatica, 37(3), 445–452.
By: N. Biehn, S. Campbell, R. Nikoukhah & F. Delebecque
2000 journal article
Compensating for order variation in mesh refinement for direct transcription methods
Journal of Computational and Applied Mathematics, 125(1-2), 147–158.
By: J. Betts, N. Biehn, S. Campbell & W. Huffman
Some comments on DAE theory for IRK methods and trajectory optimization
Journal of Computational and Applied Mathematics, 120(1/2), 109–131.
By: N. Biehn, S. Campbell, L. Jay & T. Westbrook
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