We are cellebrating 20 years of LUMEN and we continue with gifts for you!
Submit now your article for evaluation into one of the LUMEN open access journals and benefit from free open access fee!
Submit until April 15th, 2021 and, if accepted, your research or theoretical article will be published free of charge! https://lumenpublishing.com/journals/index.php/lumenpses/about/submissions
Read more about Free publication in LUMEN PSES | deadline for submission April 15th, 2021