PROTEINS-STRUCTURE FUNCTION AND GENETICS, vol. 24, no. 4, page. 514 - 515, 1996-04
MOLECULES AND CELLS, vol. 5, no. 4, page. 354 - 358, 1995-08-31
JOURNAL OF BACTERIOLOGY, vol. 177, no. 9, page. 2602 - 2605, 1995-05
JOURNAL OF BACTERIOLOGY, vol. 176, no. 21, page. 6672 - 6676, 1994-11