https://arxiv.org/pdf/1909.12313.pdf
INTRODUCTION TO MARKOV CHAIN MONTE CARLO (MCMC) SAMPLING, PART 2: GIBBS SAMPLING https://www.tweag.io/blog/2020-01-09-mcmc-intro2/ Understanding Latent Dirichlet Allocation (4) Gibbs Sampling https://naturale0.github.io/2021/02/16/LDA-4-Gibbs-Sampling