BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, vol. 288, no. 1, page. 263 - 268, 2001-10-19
NUCLEIC ACIDS RESEARCH, vol. 29, no. 14, page. 3069 - 3079, 2001-07-15
EMBO JOURNAL, vol. 20, no. 1-2, page. 295 - 304, 2001-01-15