<https://ellibrepensador.com/2010/11/16/el-todo-es-mas-que-la-suma-de-sus-partes/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ellibrepensador.com/2010/11/16/el-todo-es-mas-que-la-suma-de-sus-partes/>