Some bibliography

• Latent Variable Decomposition for Single-Channel Speaker Separation pdf
• A Probabilistic Latent Variable Model for Acoustic Modeling pdf
• Missing Data Imputation for Spectral Audio Signalspdf

A great many good references and audio samples may be found on Paris Smaragdis' webpage

Madhu Shashanka has a detailed description of the model in his thesis. His webpage also has some nice papers and demos.