1. https://www-eng.lbl.gov/~shuman/NEXT/MATERIALS&COMPONENTS/Xe_damage/Crank-The-Mathematics-of-Diffusion.pdf
  2. https://www.ippt.pan.pl/repository/open/o2277.pdf
  3. https://www.math.utah.edu/~golden/resources/clara/Notes-PDEs1.pdf
  4. https://math.stackexchange.com/questions/1095477/connections-between-the-solution-of-simple-ordinary-equation-normal-distributio
  5. https://web.math.ucsb.edu/~grigoryan/124A/lecs/lec10.pdf
  6. https://www.mathematik.tu-darmstadt.de/media/analysis/lehrmaterial_anapde/hallerd/PDESkriptWiSe22.pdf