Alberto A. Condori, “An Index Formula in Connection with Meromorphic Approximation”, Complex Anal. Oper. Theory, 7, no. 6, 2013, 1787
J. Kiskiras, I. M. Jaimoukha, G. D. Halikias, “An explicit state-space solution to the one-block super-optimal distance problem”, Math. Control Signals Syst., 25, no. 2, 2013, 167
George D. Halikias, Imad M. Jaimoukha, “The 2-block superoptimalAAK problem”, Math. Control Signal Systems, 11, no. 3, 1998, 244
Dimitrios Chiotis, Zinaida A. Lykova, N. J. Young, “Exterior products of operators and superoptimal analytic approximation”, Trans London Maths Soc, 8, no. 1, 2021, 299