Reading material: boundary element method

The link is for the book Boundary integral and singularity methods for linearized viscous flow by C. Pozrikidis. (chapter 2 for the boundary integral equation).

https://www-cambridge-org.ezproxy.uio.no/core/books/boundary-integral-and-singularity-methods-for-linearized-viscous-flow/219AA1CE5DE05AE67096EA59692E25B3