Chen , ZhimingTuo , Rui and Zhang , Wenlong. (2020). A Balanced Oversampling Finite Element Method for Elliptic Problems with Observational Boundary Data.
            <i>Journal of Computational Mathematics</i>. <i>38</i> (2).
            355-374.
         doi:10.4208/jcm.1810-m2017-0168