Combining Winnow and Orthogonal Sparse Bigrams for Incremental Spam Filtering. - Christian Siefkes; Fidelis Assis; Shalendra Chhabra; William S. Yerazunis (PKDD, 2004)

CRM114 versus Mr. X: CRM114 Notes for the TREC 2005 Spam Track. - Fidelis Assis; William S. Yerazunis; Christian Siefkes; Shalendra Chhabra (TREC, 2005)

OSBF-Lua - A Text Classification Module for Lua: The Importance of the Training Method. - Fidelis Assis (TREC, 2006)