[1]: P. Blanchard, D. J. Higham, N. J. Higham, Accurately computing the log-sum-exp and softmax functions, IMA Journal of Numerical Analysis, Volume 41, Issue 4, October 2021, Pages 2311–2330.
[2]: N. N. Schraudolph, “A fast, compact approximation of the exponential function,” Neural Comput., vol. 12, no. 9, pp. 2009-2012, 2000.
[3]: A. C. I. Malossi, Y. Ineichen, C. Bekas and A. Curioni “Fast exponential computation on SIMD architectures,” HiPEAC 2015 - 1st Workshop On Approximate Computing (WAPCO), Amsterdam, NL, 2015, doi: 10.13140/2.1.4362.3207.