Helumt Harbrecht,  John D. Jakeman &  Peter Zaspel. (2021). Cholesky-Based Experimental Design for Gaussian Process and Kernel-Based Emulation and Calibration.
            <i>Communications in Computational Physics</i>. <i>29</i> (4).
            1152-1185.
         doi:10.4208/cicp.OA-2020-0060