Alberto A. Condori, “An Index Formula in Connection with Meromorphic Approximation”, Complex Anal. Oper. Theory, 7, № 6, 2013, 1787
Dimitrios Chiotis, Zinaida A. Lykova, N. J. Young, “Exterior products of operators and superoptimal analytic approximation”, Trans London Maths Soc, 8, № 1, 2021, 299
L. Baratchart, F.L. Nazarov, V.V. Peller, “Analytic approximation of matrix functions in Lp”, Journal of Approximation Theory, 158, № 2, 2009, 242
Alberto A. Condori, “Monotone thematic factorizations of matrix functions”, Journal of Approximation Theory, 162, № 2, 2010, 441