Left eigenvalues of 2 × 2 symplectic matrices. Macias-Virgos, E.; Pereira-Saez, M.J. — 2009 ELA. The Electronic Journal of Linear Algebra [electronic only]
Cayley-Hamilton theorem for left eigenvalues of 3 × 3 quaternionic matrices E. Macías-Virgós; M.J. Pereira-Sáez — 2014 Special Matrices We prove that any quaternionic matrix of order n ≤3 admits a characteristic function, whose roots are the left eigenvalues, that satisfes Cayley-Hamilton theorem.