PyPDF4 is compared with 6 other python libraries to manipulate, create and annotate pdf files via python

Yasseri, T. (n.d.). Dominic Cummings: How the internet knows when you’ve updated your blog. The Conversation. Retrieved June 1, 2020, from http://theconversation.com/dominic-cummings-how-the-internet-knows-when-youve-updated-your-blog-139517

A good blog post on why do you need to understand backpropagation links to videos from CS231n by karpathy.