<https://blog.studylie.ru/mezhvuzovyj-nauchno-prakticheskij-kruglyj-stol/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.studylie.ru/mezhvuzovyj-nauchno-prakticheskij-kruglyj-stol/>