@article{Padian1990,
author = {Padian, N.S. and Shiboski, S.C. and Jewell, N.P.},
title= {The effect of number of exposures on the risk of heterosexual HIV transmission},
year = {1990},
journal = {Journal of Infectious Diseases},
volume = {161},
number = {5},
pages = {883--887},
}