An Analogue of Montel's Theorem for Rational Functions of Best Lp- Approximation. - Ralitza K. Kovacheva; Julian Lawrynowicz (J. Approx. Theory, 2002)

Sequences with equi-distributed extreme points in uniform polynomial approximation. - Hans-Peter Blatt; René Grothmann; Ralitza K. Kovacheva (J. Approx. Theory, 2004)

Distribution of interpolation points of maximally convergent multipoint Padé approximants. - Hans-Peter Blatt; Ralitza K. Kovacheva (J. Approx. Theory, 2015)