Li, Xiangtao Yin, Minghao Two simple geometrical bodies under the surface. <p>Two simple geometrical bodies under the surface.</p> geometrical;bodies 2013-02-19
    https://plos.figshare.com/articles/figure/_Two_simple_geometrical_bodies_under_the_surface_/197750
10.1371/journal.pone.0051199.g001