diff --git a/drupal2spip_lal/base/convert.py b/drupal2spip_lal/base/convert.py
index 76aaa96..cdcb28f 100644
--- a/drupal2spip_lal/base/convert.py
+++ b/drupal2spip_lal/base/convert.py
@@ -164,6 +164,44 @@ def filter_html(html):
     return html
 
 
+def footnotes(html):
+    bracket_pattern = re.compile(r'\[\s*(/?)\s*(fn|footnote)\s*(\s[^\]]*)?\]')
+    html = bracket_pattern.sub(r'<\1\2\3>', html)
+
+    soup = bs(html, 'html.parser')
+
+    index = 1
+    seen_values = []
+    for fn in soup.find_all(['fn', 'footnote']):
+        if 'value' in fn.attrs and fn.attrs['value'] in seen_values:
+            value = fn.attrs['value']
+            fn.clear()
+        elif 'value' in fn.attrs and fn.attrs['value']:
+            value = fn.attrs['value']
+            seen_values.append(value)
+        else:
+            value = ""
+            seen_values.append(str(index))
+            index += 1
+        if value:
+            spip_fn = fn.wrap(soup.new_tag('spip:fn', value=value))
+        else:
+            spip_fn = fn.wrap(soup.new_tag('spip:fn'))
+        spip_fn.fn.unwrap()
+
+    html = str(soup)
+    # Spip a eu la bonne idée de choisir les crochets et chevrons
+    # pour indiquer les réfs.
+    spip_fn_open_pattern = re.compile(r'<spip:fn>')
+    spip_fn_close_pattern = re.compile(r'</spip:fn>')
+    spip_fn_value_pattern = re.compile(r'<spip:fn value="([^"]+)">')
+
+    html = spip_fn_open_pattern.sub(r'[[', html)
+    html = spip_fn_close_pattern.sub(r']]', html)
+    html = spip_fn_value_pattern.sub(r'[[<\1>', html)
+    return html
+
+
 def sanitarize_html(html, node_fmt):
     html = strong_to_dl(html)
 
@@ -176,7 +214,9 @@ def sanitarize_html(html, node_fmt):
     else:
         raise NotImplementedError("Ce node est dans un format inconnu.")
 
-    return str(bs(html, 'html.parser'))
+    html = footnotes(html)
+
+    return html
 
 
 def convert_node(node, options):