Pisarenko, V. “On Estimates for the Parameters of a Gaussian Stationary Process With the Spectral Density [P(iλ)]^{-2}”. Lithuanian Mathematical Journal 2, no. 2 (December 20, 1962): 159–167. Accessed June 8, 2025. https://www.zurnalai.vu.lt/LMJ/article/view/19348.