What to do when you're cited, but the author doubts the validity of your results So, this just happened recently - I and my colleagues were cited in a scientific, peer reviewed paper (our article was published in a scientific journal as well). The author summarizes our findings (to a degree) and then concludes that because of two failures, we compromised the study's validity. However, those two "failures" were correctly addressed in our paper. I guess the author did not bother to read the complete article and, thus, highlighted the supposed "failures" that were accordingly addressed.

I have the e-mail address of the author, but I don't know what good would it do if I explain the situation. I'm not happy with this citation, since it (wrongly) presents our study in a bad light.

Since the article was already published, is there anything we can do? Thanks for suggestions.
So your study was (by design) limited in scope, they're researching something outside of your scope, and your approach fails to provide a solution in their problem area.  It sounds like you and they agree.

Take a close look and see whether they actually said that your study was compromised, or whether you simply got defensive because they said your method failed when they tried to use it.

Your discomfort may be caused by the fact that you've failed to look at it from the perspective and scope of their paper.  They have to prove that there's a problem, and that existing approaches (including yours) don't solve that problem, because that motivates the solution they present.  If they aren't making any claim that your approach doesn't work within the scope you claimed, then while you may have preferred that they used verbiage such as "Our problem is excluded by the approach described in user67334's groundbreaking work on (other problem)", they didn't.

Instead they used words which are descriptive from the perspective of the problem they're discussing, and since that's a limitation you already explicitly acknowledged, doing so doesn't actually detract from your work in any way.