The following sources are referenced in JSL Syntax Reference.
Bentley, J. L. (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.