Model-based document clustering with a collapsed gibbs sampler. - Daniel David Walker; Eric K. Ringger (KDD, 2008)

Evaluating Models of Latent Document Semantics in the Presence of OCR Errors. - Daniel David Walker; William B. Lund; Eric K. Ringger (EMNLP, 2010)

Progressive Alignment and Discriminative Error Correction for Multiple OCR Engines. - William B. Lund; Daniel David Walker; Eric K. Ringger (ICDAR, 2011)

A synthetic document image dataset for developing and evaluating historical document processing methods. - Daniel David Walker; William B. Lund; Eric K. Ringger (DRR, 2012)

Topics Over Nonparametric Time: A Supervised Topic Model Using Bayesian Nonparametric Density Estimation. - Daniel David Walker; Eric K. Ringger; Kevin D. Seppi (BMA, 2012)

Evaluating supervised topic models in the presence of OCR errors. - Daniel David Walker; Eric K. Ringger; Kevin D. Seppi (DRR, 2013)

How well does multiple OCR error correction generalize? - William B. Lund; Eric K. Ringger; Daniel David Walker (DRR, 2014)