Hope that the question is not a duplicate, I could not find anything similar.
I am doing a PhD in mathematical economics but I usually look at math journals and I am trying to adapt some technical methods from there to economics when it is necessary.
What I am always curious about, as I am not familiar at all with mathematics journals, I don't know which journal is a good quality journal in mathematics (as there exists a huge bunch of journal in mathematics, if I am not wrong) I don't know if the paper published in the journal is a really credible reference.
Besides Google Scholar citations, what are the best ways to understand if a journal (in the field of mathematics or other) is a well ranked journal ?