Hey. Thank you for comment. For sure Clean Coder book written by Uncle Bob is a good reference for soft parts of Software Developement process. I highly recommend this for you.

https://www.goodreads.com/book/show/10284614-the-clean-coder

But I do not remember is there anything more about estimations. In my opininon the presentation that this article is based on, is quite deep into the topic and enough for most of the developers.