Padé and Hermite-Padé approximation and orthogonality. Van Assche, Walter (2006) Surveys in Approximation Theory (SAT)[electronic only]
Padé-Type Approximants of Exp (-z) Whose Denominators Are (1+z/n)n. Jeannette van Iseghem (1984) Numerische Mathematik
Power Series Equivalent to Rational Functions: A Shifting-Origin Kronecker Type Theorem, and Normality of Padé Tables. D.S. Lubinsky (1989) Numerische Mathematik