1. J. Nuttall, “Asymptotics of diagonal Hermite–Padépolynomials,” J. Approx. Theory 42 (4), 299–386 (1984).
2. E. M. Nikishin and V. N. Sorokin, Rational Approximation and Orthogonality (Nauka, Moscow, 1988) [in Russian].
3. W. Van Assche, “Padéand Hermite–Padéapproximation and orthogonality,” Surv. Approx. Theory 2, 61–91 (2006).
4. A. A. Gonchar, E. A. Rakhmanov, and V. N. Sorokin, “Hermite-Padéapproximants for systems of Markov-type functions,” Mat. Sb. 188 (5), 33–58 (1997) [Sb.Math. 188 (5), 671–696 (1997)].
5. U. Fidalgo Prieto, A. López García, G. López Lagomasino, and V. N. Sorokin, “Mixed type multiple orthogonal polynomials for two Nikishin systems,” Constr. Approx. 32 (No. 10), 255–306 (2010).