@misc{Cha-2020,
    title={Waves seminar at UC Merced },
    organization={Recent advances on the preconditioning of 3D fast Boundary 
           Element Solvers for 3D acoustics and elastodynamics },
    address={https://ucmerced.app.box.com/s/ej5o1khnmebbxugmngkkhxy50swkbkxn },
    journal={https://appliedmath.ucmerced.edu/seminars/imaging-and-sensing/waves },
    year={2020 },
    month={10},
    comment={{umatype:'online_talk'}},
}