The Dilogarithm Function of a Real Argument [S22] (Algorithm 490).

E. S. Ginsberg Dorothy Zaborowski The Dilogarithm Function of a Real Argument [S22] (Algorithm 490). 200-202 1975 18 Commun. ACM 4 db/journals/cacm/cacm18.html#GinsbergZ75 http://doi.acm.org/10.1145/360715.360722