https://cecs.wright.edu/~sthomas/htchapter02.pdf https://www.math.colostate.edu/~bangerth/videos.html https://www.osti.gov/servlets/purl/986602-ENHb2G/ https://www.osti.gov/servlets/purl/1724498 https://www.youtube.com/watch?v=FuKThdBYIX4

https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnm.1063