Li, Jia ; Ochman, Howard ; Groisman, Eduardo A.... Proceedings of the National Academy of Sciences of the United States of America.
92
(1995)
16
- p.
7252-7256
,
1995
Nelson, Kimberlyn ; Selander, Robert K. Proceedings of the National Academy of Sciences of the United States of America.
91
(1994)
21
- p.
10227-10231
,
1994