[2] G. Hartman, Fundamentals of matrix algebra, 3rd ed. Self-published, 2011. Available: http://www.apexcalculus.com/other-texts
[3] S. Axler, Linear algebra done right, 4th ed. Springer, 2024. Available: https://linear.axler.net/
Warning. These sources are locked behind corporate paywalls or distributed unethically with DRM encryption and/or surveillance.
[6] J. W. Cutrone, “Linear algebra from elementary to advanced specialization,” Johns Hopkins University; Coursera. Available: https://www.coursera.org/specializations/linear-algebra-elementary-to-advanced