CHEN, Leilei, Wenchang ZHAO, Cheng LIU, Haibo CHEN, and Steffen MARBURG. 2019. “Isogeometric Fast Multipole Boundary Element Method Based on Burton-Miller Formulation for 3D Acoustic Problems”. Archives of Acoustics 44 (3): 475–492. https://doi.org/10.24425/aoa.2019.129263.