A method for the structural analysis of two-dimensional mathematical expressionsShi-Kuo Chang1970Information Sciences
The application of the fast Fourier transform algorithm to the estimation of spectra and cross-spectraJ.W. CooleyP.A. Lewiset al.1970Journal of Sound and Vibration
Photoemission studies of d-band structure in Sc, Y, Gd, Ti, Zr, Hf, V, Nb, Cr and MoD.E. Eastman1969Solid State Communications
Exact solution of the Boltzmann equation in the relaxation approximation, existence of negative differential conductivity for certain types of energy bands and its implication for the fluctuation spectrum and the noise temperatureWerner A. Schlup1969Physik der Kondensierten Materie