Z. da Rocha, Mathematica Implementation of Recurrence Relations of Biorthogonality, Numerical Algorithms 3 (1992) 173-183, www.netlib.org/numeralgo/ na3 package.
Z. da Rocha, Mathematica Implementation of Recurrence Relations of Biorthogonality, Numerical Algorithms 3 (1992) 173-183, www.netlib.org/numeralgo/ na3 package.