Orthogonal polynomials on the unit circle and chain sequences. - Marisa de Souza Costa; Heron Martins Felix; A. Sri Ranga (J. Approx. Theory, 2013)

A Favard type theorem for orthogonal polynomials on the unit circle from a three term recurrence formula. - Kenier Castillo; Marisa de Souza Costa; A. Sri Ranga; Daniel O. Veronese (J. Approx. Theory, 2014)