1. Asymptotics of Hermite-Padé approximants for a pair of functions with branch points (Russian);Aptekarev;Dokl. Akad. Nauk,2008
2. Alexander I. Aptekarev, Maxim L. Yattselev, Padé approximants for functions with branch points—strong asymptotics of Nuttall–Stahl polynomials, arXiv: http://arxiv.org/abs/1109.0332 (2011), 45 pp.
3. Weighted extremal domains and best rational approximation;Baratchart;Adv. Math.,2012
4. Convergence of multipoint Padé approximants of piecewise analytic functions;Buslaev;Mat. Sb.,2013