1. ARKO., R.J.: Neisseria gonorrhoeae: Experimental infection of laboratory animals, Science 177: 1.200, 1972.
2. ARKO, R.J., DUNCAN, W.P., BROWN, W.J., et al.: Inmunity in infection with Neisseria gonorrhoeae: Duration and serologic response in the chimpanzee, J. Infect. Dis. 133: 441, 1976.
3. BRINTON, C.C., BRYAN, J., DILLON, J. ct. al.: Uses of pili in Gonorrhoeae Control: Role of Bacterial Pili in Disease, Purification and Properties of Gonococcal Pili, and Progress in the Development of a Gonococcal Vaccine for Gonorrhea, in Brooks, G.F., et al (eds.), Immunobiology of N. gonorrhoeae (Washington, D.C.: ASM, 1978), p. 55.
4. BUCHANAN, T.M.: Antigenic heterogeneity of gonococcal pili. J. Exp. Med. 141: 1.470, 1975.
5. BUCHANAN, TM et al: Gonococcal salpingitis is less likely to recur with Neisseria gonorrhoeae of the same principal outer membrane protein antigenic type. Am. J. Obstet. Gynecol 138: 978, 1980.