ty -jour a2 -witelski，Thomas P. au -Baryarama，F.Au -Mugisha，J.Y。T. Py -2007 DA -2007/12/30 Ti-比较HIV/AIDS传输SP -018908VL -2007 AB -SN -0161-1712 UR -https：//doi.org/10.1155/2007/18908 do -10.1155/2007/18908 JF-国际数学与数学科学杂志PB- Hindawi Publistion Corporation kw -er- Er- er- er- er- er- ER-