(1)
Silva , C. J. da; Soares, W. de A.; Galdino, S. M. L.; Silva , J. D. da; Medeiros , J. C. O. de. A Look at the Composition of Linear Transformations in the Language of Matrices, Some Types of Matrices of Order 2 Represented Geometrically in the R2 Plane. Editora 2024, 794-832.