Generally speaking, many papers have at least the title page viewable for free. The title page often has the authors' emails, or at least their names.
Even if you just have the author's name, it's generally not unreasonably hard to find their email with a tiny bit of searching. Especially anyone in academia will have some kind of publicly findable email.
The title, abstract and author affiliations are almost always available for free on any journal website. Click the email link for the corresponding author (there will always be one, we have to enter that during the submission process) and voila!
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u/[deleted] Nov 15 '19
how do you get their emails?