Shushkevich, Gennady, Svetlana Shushkevich, and Feliks Stachowicz. 2016. “The Scattering of the Sound Field by Thin Unclosed Spherical Shell and Ellipsoid”. Advances in Mechanical and Materials Engineering 33 (293 (2), 167-81. https://doi.org/10.7862/rm.2016.14.