Limits to annotation precision. - Geoffrey Sampson; Anna Babarczy (LINC@EACL, 2003)

A test of the leaf-ancestor metric for parse accuracy. - Geoffrey Sampson; Anna Babarczy (Nat. Lang. Eng., 2003)

Definitional, personal, and mechanical constraints on part of speech annotation performance. - Anna Babarczy; John Carroll 001; Geoffrey Sampson (Nat. Lang. Eng., 2006)

Definitional and human constraints on structural annotation of English. - Geoffrey Sampson; Anna Babarczy (Nat. Lang. Eng., 2008)