Update app.py

app.py

@@ -86,6 +86,21 @@ def create_bibtex_entry(data):
     if year and 'year' not in data:
         data['year'] = year
 
+    match_year = re.search(r'\b(\d{4})\b', data['year'])
+    
+    if match_year:
+        data['year'] = match.group(1)
+    else:
+        data.pop('year', '')
+
+    #Pages conformity.
+    if 'pages' in data:
+        match = re.search(r'\b(\d+(-\d+)?)\b', data['pages'])
+        if match:
+            data['pages'] = match.group(1)
+        else:
+            data.pop('pages', '')
+
     year = data['year']
     author_words = data.get('author', '').split()
     first_author = author_words[0] if author_words else 'unknown'