We have stopped our fast track for Covid-19 articles


Dear Contributors,

This is a short note to let you know, that we received enough numbers of submissions on Covid for our thematic issue. Thank you so much for your trust, we didn't expect to receive so many submissions on this topic (more than 50 articles), much too many to publish them as special thematic articles (8 selected articles). 

Starting from now we will proceed all new submissions on Covid as regular articles (the expected time of publishing is mid-2022 and even later). 

Best regards,