Citation for Reducing the computational cost of the ECF using a nuFFT: A fast and objective probability density estimation method

O’Brien, T. A., Collins, W. D., Rauscher, S. A., & Ringler, T. D. (2014). Reducing the computational cost of the ECF using a nuFFT: A fast and objective probability density estimation method. Computational Statistics & Data Analysis, 79, 222–234. https://doi.org/10.1016/j.csda.2014.06.002