1. P.S.R. Diniz, B. Widrow, History of adaptive filters, in A Short History of Circuits and Systems, ed. by. F. Maloberti, A.C. Davies (River Publishers, Delft, 2016)
2. C.F. Gauss, Theoria Combinationis Observationum Erroribus Minimis Obnoxiae: Pars Prior, Pars Posterior, Supplementum, Classics in Applied Mathematics, translated as Theory of the Combination of Observations Least Subject to Errors: Part one, Part two, Supplement, by G.W. Stewart (SIAM, Philadelphia, 1995)
3. B. Widrow, D. Park, History of Adaptive signal processing: Widrow’s group, in A Short History of Circuits and Systems, ed. by F. Maloberti, A.C. Davies (River Publishers, Delft, 2016)
4. S. Theodoridis, Machine Learning: A Bayesian and Optimization Perspective (Academic Press, Oxford, 2015)
5. P.S.R. Diniz, E.A.B. da Silva, S.L. Netto, Digital Signal Processing: System Analysis and Design, 2nd edn. (Cambridge University Press, Cambridge, 2010)