The Gauss-Markov approximated scheme for identification of multivariable dynamical systems via the realization theory : an explicit approach / by A.K. HajdasinskiLinear multivariable systems : preliminary problems in mathematical description, modelling and identification / by A.K. HajdasińskiRealization of the markov parameter sequences using the singular value decomposition of the hankel matrix / by A.K. Hajdasinski and A.A.H. Damen