Universal Padé approximants with respect to the chordal metric. (English) Zbl 1302.41021
J. Contemp. Math. Anal., Armen. Acad. Sci. 47, No. 4, 168-181 (2012) and Izv. Nats. Akad. Nauk Armen., Mat. 47, No. 4, 13-34 (2012).