Sue Kalman, Wayne Mitchell, Rekha Marathe, Claudia Lammel, Jun Fan, Richard W Hyman, Lynn Olinger, Jane Grimwood, Ronald W Davis, Richard Stephens,
Comparative genomes of Chlamydia pneumoniae and C. trachomatis. Nature Genetics. ,vol. 21, pp. 385- 389 ,(1999) ,
10.1038/7716