I put together this course after a long research and my own experience. I have collected everything from the net, books and my own experience to make it as complete as possible so that it can help you commute.
On the subject of “pendulum”, there is a very large collection and selection of texts in Internet pages and bookshops. In the pendulum course, I teach everything that I find coherent for me and can deviate from what you have read or learned about commuting so far.