<https://financial-pro.ru/kriptovaljuta/ethereum-majning-s-nulya-poshagovaya-instrukciya-2021/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://financial-pro.ru/kriptovaljuta/ethereum-majning-s-nulya-poshagovaya-instrukciya-2021/>