I wanted to read those papers, but I can't find anything about the second one beyond the fact that it exists.
https://www.scribd.com/doc/166556276/Benter
If you're interested in those two papers, the earlier paper 'Searching for Positive Returns at the Track: A Multinomial Logit Model for Handicapping Horse Races' (Bolton, Ruth N. and Randall G. Chapman) is also worth reading:
Edit: there's a 2008 version or reprint of the first paper: https://www.worldscientific.com/doi/abs/10.1142/978981281919...
I don't believe that's a paywall, just Researchgate being scummy like usual and using a citation while pretending to have a copy - all that would do is ping Benter to ask for a copy. I can't find any evidence that that conference presentation was published or that the conference proceedings as a whole were ever published.