Li, C., Feng, Y., Owen, R., Li, D. F., & Davies, I. (2008). A Fourier-Karhunen-Loève discretization scheme for stationary random material properties in SFEM. International Journal for Numerical Methods in Engineering, 73(13), pp. 1942-1965. doi:10.1002/nme.2160

Li, Chenfeng, Yuntian Feng, Roger Owen, D. F. Li, and Ian Davies. "A Fourier-Karhunen-Loève Discretization Scheme for Stationary Random Material Properties in SFEM." International Journal for Numerical Methods in Engineering 73, no. 13 (2008): 1942-1965.

Li, Chenfeng, et al. "A Fourier-Karhunen-Loève Discretization Scheme for Stationary Random Material Properties in SFEM." International Journal for Numerical Methods in Engineering 73.13 (2008): 1942-1965.