A recent paper has popped up on my radar that appears (from the title + abstract) to be related to the work in a paper I’m writing. However, it’s published in a fairly low-tier conference that has all proceedings behind a pay-wall. I’ve tried to find it on the authors homepages and also tried to email them for a copy, but they haven’t responded to me. Am I expected to buy the paper for 25 euros, just to see if the content is actually relevant?