Monika Garg and  Lillie Dewan,  A Generalized Approach for State Analysis and Parameter Estimation of Bilinear Systems using Haar Connection Coefficients.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2011, vol. 51(3). 422 - 427
    [viewed 24 January 2020]. Available from: https://publications.waset.org/pdf/14945.