Orthogonal matrix polynomials satisfying second order difference equations. - Renato Álvarez-Nodarse; Antonio J. Durán Guardeño; Ana M. de los Ríos (J. Approx. Theory, 2013)

Matrix-valued little q-Jacobi polynomials. - Noud Aldenhoven; Erik Koelink; Ana M. de los Ríos (J. Approx. Theory, 2015)