Such created page is to store all documents and blog explaining algorithm, maths, intuition or everything regarding text working, text searching, text mining, text modeling, etc.
1. LDA easy to understand: https://tedunderwood.com/2012/04/07/topic-modeling-made-just-simple-enough/
and also for more understandable https://github.com/tedunderwood/BrowseLDA
2. Others: https://sumidiot.wordpress.com/2012/06/13/lda-from-scratch/
3. https://eight2late.wordpress.com/2015/05/27/a-gentle-introduction-to-text-mining-using-r/
4. Books: Mastering Text Mining with R, Ashish Kumar, Avinash Paul