diff --git a/fastapi_rss/models/feed.py b/fastapi_rss/models/feed.py
index e9bfe8c..1d4a2c1 100644
--- a/fastapi_rss/models/feed.py
+++ b/fastapi_rss/models/feed.py
@@ -46,7 +46,7 @@ def _generate_tree_list(root: etree.Element, key: str, value: List[dict]) -> Non
             if content is not None:
                 itemroot.text = content
             else:
-                RSSFeed.generate_tree(itemroot, item)
+                RSSFeed.generate_tree(itemroot, item, {})
 
     @staticmethod
     def _generate_tree_object(root: etree._Element, key: str, value: Union[dict, BaseModel]) -> None:
@@ -92,7 +92,7 @@ def _generate_tree_default(root: etree._Element, key: str, value: Any) -> None:
         element.text = str(value)
 
     @staticmethod
-    def generate_tree(root: etree.Element, dict_: dict):
+    def generate_tree(root: etree.Element, dict_: dict, nsmap: dict):
         handlers = {
             (list, ): RSSFeed._generate_tree_list,
             (BaseModel, dict): RSSFeed._generate_tree_object,
@@ -107,10 +107,15 @@ def generate_tree(root: etree.Element, dict_: dict):
                     break
             else:
                 RSSFeed._generate_tree_default(root, key, value)
+                if key == "docs" and 'http://www.w3.org/2005/Atom' in nsmap.values():
+                    atom_link = etree.SubElement(root, '{http://www.w3.org/2005/Atom}link', nsmap=nsmap)
+                    atom_link.set('href', value)
+                    atom_link.set('rel', 'self')
+                    atom_link.set('type', 'application/rss+xml')
 
     def tostring(self, nsmap: Optional[Dict[str, str]] = None):
-        nsmap = nsmap or {}
+        nsmap = nsmap or {'atom': 'http://www.w3.org/2005/Atom'}
         rss = etree.Element('rss', version='2.0', nsmap=nsmap)
         channel = etree.SubElement(rss, 'channel')
-        RSSFeed.generate_tree(channel, self.dict())
-        return etree.tostring(rss, pretty_print=True, xml_declaration=True)
+        RSSFeed.generate_tree(channel, self.dict(), nsmap)
+        return etree.tostring(rss, pretty_print=True, xml_declaration=True, encoding='UTF-8')
diff --git a/tests/test_rss_response.py b/tests/test_rss_response.py
index 82a60b1..421347b 100644
--- a/tests/test_rss_response.py
+++ b/tests/test_rss_response.py
@@ -8,7 +8,7 @@ def test_rss_sample_response(client: TestClient, expected_response: str, capsys)
     response = client.get('/1')
     assert response.status_code == 200
     tree = etree.fromstring(response.content)
-    pretty: str = etree.tostring(tree, pretty_print=True, xml_declaration=True).decode('ascii')
+    pretty: str = etree.tostring(tree, pretty_print=True, xml_declaration=True).decode('utf-8')
     for line, expected_line in zip(pretty.splitlines(), expected_response.splitlines()):
         assert dedent(line) == dedent(expected_line), f'{line} != {expected_line}'