Jiajie Li & Shengfeng Zhu. (2022). On Distributed $H^1$ Shape Gradient Flows in Optimal Shape Design of Stokes Flows: Convergence Analysis and Numerical Applications.
            <i>Journal of Computational Mathematics</i>. <i>40</i> (2).
            231-257.
         doi:10.4208/jcm.2009-m2020-0020