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APA Citation
Ooi, J. H., Tan, C. P., Chua, W., & Wang, X. (2017). state and unknown input estimation for a class of infinitely unobservable descriptor systems using two observers in cascade. Journal of the Franklin Institute, 354(18), 8374–8397. http://access.bl.uk/ark:/81055/vdc_100054258757.0x000062