『スクリプト構文リファレンス』では、以下の文献を参考にしています。
Bentley, Jon Louis. (1975). "Multidimensional binary search trees used for associative searching." Communications of the ACM 18, 9:509–517.
Gander, W., and Gautschi, W. (2000). “Adaptive Quadrature–Revisited.” BIT Numerical Mathematics 40:84–101.
Moore, W. A., and Parks, D. R. (2012). “Update for the logicle data scale including operational code implementations.” Cytometry Part A 81A:273–277.
Uhlmann, Jeffrey (1991). "Satisfying General Proximity/Similarity Queries with Metric Trees". Information Processing Letters. 40 (4): 175–179.