Trigonometric Polynomial Approximation in the L1-Form. Franz Peherstorfer — 1979 Mathematische Zeitschrift
Interpolatory Properties of Best L1-approximants. Franz Peherstorfer; András Kroó — 1987 Mathematische Zeitschrift
Chebyshev approximation via polynomial mappings and the convergence behaviour of Krylov subspace methods. Fischer, Bernd; Peherstorfer, Franz — 2001 ETNA. Electronic Transactions on Numerical Analysis [electronic only]