<https://otacun.net/blog/tag/%d9%81%d9%86%d9%8a-%d9%88%d8%ac%d8%af%d8%a7%d8%aa-%d8%aa%d9%83%d9%8a%d9%8a%d9%81/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://otacun.net/blog/tag/%D9%81%D9%86%D9%8A-%D9%88%D8%AC%D8%AF%D8%A7%D8%AA-%D8%AA%D9%83%D9%8A%D9%8A%D9%81/>