https://peeterjoot.com/2014/11/10/ece1254h-modeling-of-multiphysics-systems-lecture-14-backward-euler-method-and-trapezoidal-methods-taught-by-prof-piero-triverio/
ECE1254H Modeling of Multiphysics Systems. Lecture 14: Backward Euler method and trapezoidal methods. Taught by Prof. Piero Triverio