Sometimes, if the journal is very new, it may not be available in the filter yet, but we may have harvested some articles from Crossref or our other sources already. You can test this by searching for some of your DOIs or a DOI prefix (via the DOI search option at the top; if searching for partial DOIs like prefixes, make sure to add an asterisk (*) at the end). If you find the articles, but they appear without a journal name, this will likely be added with one of the next releases of our journal database, which gets updated several times a year.