UEGO sensor

[JC_ZHOLIDAY at SEOVEC.OHIO.GOV]

I'm currently doing some research for a port fuel injection system that I 
want to build.  I'm wanting it to be able to measure the true a/f ratio 
or at least as close as possible to it. What I'm needing is some 
information on interfacing with UEGO sensors. Also, I've seen a few 
posting and articles refering to SAE papers or journals, how can I get a 
hold of these?

Ezekiel Holliday
JC_ZHOLIDAY at SEOVEC.OHIO.GOV