One of the big obstacles of accessing detailed evidence is the paywall many scientific publishers erect. It is not unusual to find that a mere 24 hours of access to a paper costs more than $30 (!!).
Here are two ways to circumvent that problem.
- Many (co-)authors keep a copy of published papers on their personal website or that of their institution. A good way of finding these is to google* the full title of the paper, perhaps adding the term 'PDF'. You'd be surprised how often that produces a hit of the very same paper that costs a lot of money elsewhere. Sometimes it is not the definitive version but a late draft, but even that can be helpful if you're interested in the detail
- If this fails, try out sci-hub. This is a site set up in reaction to the stranglehold publishers have over the access to research results (almost all of which has been paid for by public money). (Read this article on The Big Think to find out more about it.)
You can generally search by title, but also by URL of the original, paywalled article, or the DOI. It is rare for an article not to be available there. (Note that the legal status of sci-hub is dubious.)
*: other search engines are of course available :-)
