1. ACL2 version 7.4.
http://www.cs.utexas.edu/users/moore/acl2/
2. Aransay, J., Divasón, J.: Formalisation in higher-order logic and code generation to functional languages of the Gauss-Jordan algorithm. J. Funct. Program. 25(9), 1–21 (2015)
3. Aransay, J., Divasón, J.: Formalization of the computation of the echelon form of a matrix in Isabelle/HOL. Form. Asp. Comput. 28, 1005–1026 (2016)
4. Cano, G., Cohen, C., Dénès, M., Mörtberg, A., Siles, V.: Formalized linear algebra over elementary divisor rings in Coq logical methods in computer. Science 12(2), 1–29 (2016)
5. Cowles, J., Gamboa, R., Van Baalen, J.: Using ACL2 arrays to formalize matrix algebra. In: Proceedings of ACL2 2003 (2003)