Jones, W. B., W. J. Thron, and H. Waadeland. “Value Regions for Continued Fractions $K(a_n 1)$ Whose Elements Lie in Parabolic Regions”. MATHEMATICA SCANDINAVICA 56 (December 1, 1985): 5–14. Accessed August 14, 2026. https://tidsskrift.dk/math/article/view/12084.