SEYBERT, A. F., and J. CROCKER. “The Effect of Input Cross-Spectra on the Estimation of Frequency Response in Certain Multiple-Input Systems”. Archives of Acoustics 3, no. 3 (September 30, 1978): 153–174. Accessed April 18, 2026. http://acoustics.ippt.gov.pl/index.php/aa/article/view/3404.