Andy
Senior Member (Voting rights)
Direct link to the PDF file, https://www.mdpi.com/2218-1989/10/5/216/pdfThanks for posting. I wanted to read the letter, but was unable to see it. Any way of unlocking it??Merci.
Also note that the webpage says
This is an early access version, the complete PDF, HTML, and XML versions will be available soon.