searxng/searx/templates/simple/preferences/doi_resolver.html

<fieldset>{{- '' -}}
  <legend id="pref_doi_resolver">{{- _('Open Access DOI resolver') -}}</legend>{{- '' -}}
  <div class="value">{{- '' -}}
    <select id='doi_resolver' name='doi_resolver' aria-labelledby="pref_doi_resolver">{{- '' -}}
      {%- for doi_resolver_name,doi_resolver_url in doi_resolvers.items() -%}
        <option value="{{ doi_resolver_name }}"
                {%- if doi_resolver_url == current_doi_resolver %} selected="selected" {%- endif -%}>
                {{- doi_resolver_name }} - {{ doi_resolver_url -}}
        </option>
      {%- endfor -%}
    </select>{{- '' -}}
  </div>{{- '' -}}
  <div class="description">
    {{- _('Select service used by DOI rewrite') -}}
  </div>{{- '' -}}
</fieldset>{{- '' -}}