whois https://en.dp.ua/files/journals/1/articles/543/submission/543-1-807-1-2-20221127.html

Domain:
Turn off cache
Try for webbased whois (don't expect it to work yet)
https://en.dp.ua/files/journals/1/articles/543/submission/543-1-807-1-2-20221127.html
checking....https://en.dp.ua/files/journals/1/articles/543/submission/543-1-807-1-2-20221127.html
   $ whois https://en.dp.ua/files/journals/1/articles/543/submission/543-1-807-1-2-20221127.html
No whois server is known for this kind of object.