1. Essentials of Padé Approximants;Baker,1975
2. Rational approximants defined from double power series;Chisholm;Math. Comp.,1973
3. Rational polynomial approximants in N variables;Chisholm;Lecture Notes in Physics,1976
4. Generalization of the theorem of de Montessus to two-variable approximants;Chisholm;Proc. Royal Society Ser. A,1975
5. Chisholm, J.S.R. and R. Hughes Jones, Relative scale covariance of N-variable approximants, U. of Kent preprint, Canterbury (1974).