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Zhang, Yong-An; Di Zhou, ; Duan, Guang-ren . (2006). [IEEE Multiconference on "Computational Engineering in Systems Applications - Beijing, China (2006.10.4-2006.10.6)] The Proceedings of the Multiconference on "Computational Engineering in Systems Applications" - An Adaptive Iterated Kalman Filter. , (), 1727–1730. doi:10.1109/cesa.2006.4281916 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research