Letter of the National Science Center director in relation to "predatory journals" in Polish).
"Predatory" journal catalogue.
Multidisciplinary Digital Publishing Institute (MDPI) journals.
Other links on the topic:
https://www.nature.com/articles/d41586-019-03759-y https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7237319/ https://academic.oup.com/rev/article/30/3/405/6348133
https://thinkchecksubmit.org/
https://thinkchecksubmit.org/journals/)
https://thinkcheckattend.org/