P. Guillaume, R. Pintelon, and J. Schoukens, “Parametric identification of
multivariable systems in the frequency domain : a survey,” International Seminar on Modal Analysis, Leuven, September, pp. 1069–1080,
C. Farhat and M. Géradin, “On the general solution by a direct method of a
large-scale singular system of linear equations: Application to the analysis
of floating structures,” International Journal for Numerical Methods in
Engineering, vol. 41, pp. 675–696, 1998.