1. On Dirichlet distribution or process
[nips2010] Word Feature for Latent Dirichlet Allocation
[nips2010] Shadow Dirichlet for Restricted Probability Modeling
[nips2010] Construction of Dependent Dirichlet Processes based on Poisson Processes
2. On Gaussian Processes
Gaussian Process Topic Models [link]
Flexible and efficient Gaussian process models for machine learning[link]
3. On approximate inference
Graphical Models, Exponential Families, and Variational Inference