Books on Amazon
Regress / evidence/ relation / Nozick: the regress that we need a proof that something is an evidence is stopped when a document has a dual power - a) as evidence of something - b) for the fact that it is an evidence for something. - In other words, that it is evidence for two contingent statements - a particular one and a more general document about the relationship - logical form:e.g. eRh and also e R (eRh) and it is also the case that e R [e R (eRh)] then we have no regress - if it is the same evidence e the regress is stopped before: if eR (eRh).
Philosophical Explanations Oxford 1981
The Nature of Rationality 1994