F. E. Levis. (1970). A Note on Padé Approximants Pairs as Limits of Algebraic Polynomials Pairs of Weighted Best Approximation in Orlicz Spaces.
            <i>Analysis in Theory and Applications</i>. <i>31</i> (3).
            253-259.
         doi:10.4208/ata.2015.v31.n3.4