1. A method for computing least squares estimators that keep up with the data;Albert;SIAM Journal on Control,1965
2. On the stability and convergence of a sliding-window variable-regularization recursive-least-squares algorithm;Ali;International Journal of Adaptive Control and Signal Processing,2016
3. Adaptive control;Astrom,1995
4. Scalar, vector, and matrix mathematics: Theory, facts, and formulas - revised and expanded edition;Bernstein,2018
5. Implementation of self-tuning regulators with variable forgetting factors;Fortescue;Automatica,1981