Press, WH; Teukolsky, SA; Vetterling, WT; Flannery, BP (2007), "Section 4.5. Quadrature by Variable Transformation", Numerical Recipes: The Art of Scientific Computing (3rd ed.), New York: Cambridge University Press, ISBN 978-0-521-88068-8 Takahasi, Hidetosi; Mori, Masatake (1974), "Double exponential formulas for numerical integration", Publications of the Research Institute for Mathematical Sciences, 9 (3): 721–741, doi:10.2977/prims/1195192451, ISSN 0034-5318 .