PACdb: PolyA Cleavage Site and 3'-UTR Database. - J. Michael Brockman; Priyam Singh; Donglin Liu; Sean Quinlan; Jesse Salisbury; Joel H. Graber (Bioinform., 2005)

Position-dependent motif characterization using non-negative matrix factorization. - Lucie N. Hutchins; Sean M. Murphy; Priyam Singh; Joel H. Graber (Bioinform., 2008)