<https://secure.gravatar.com/avatar/27f85ebcc47fa2c52c9c39451357e24a?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://interior-center.ru/blog/poleznye-sovety/modul-naa-prihozaa-stoubi/>