2011

Rubin, T. N.; Chambers, A.; Smyth, P. & Steyvers, M. (2011), 'Statistical Topic Models for Multi-Label Document Classification' , cite arxiv:1107.2462 .

2009

Carpena, P.; Bernaola-Galván, P.; Hackenberg, M.; Coronado, A. V. & Oliver, J. L. (2009), 'Level statistics of words: Finding keywords in literary texts and symbolic sequences', Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) 79 , 035102 .