diff --git a/modules/purchase_trade/purchase.py b/modules/purchase_trade/purchase.py
index 0f16b5d..c01f26c 100755
--- a/modules/purchase_trade/purchase.py
+++ b/modules/purchase_trade/purchase.py
@@ -635,6 +635,25 @@ class AssayImporter:
         return None  # ou lever une erreur selon ton besoin
 
     def _parse_date(self, date_str):
+        if not date_str:
+            return None
+
+        formats = [
+            "%Y-%m-%d",      # 2025-02-28
+            "%d-%b-%Y",      # 28-Feb-2025
+            "%d-%B-%Y",      # 28-February-2025
+            "%d/%m/%Y",      # 28/02/2025
+        ]
+
+        for fmt in formats:
+            try:
+                return datetime.datetime.strptime(date_str, fmt).date()
+            except Exception:
+                continue
+
+        return None
+    
+    def _parse_date_(self, date_str):
         if not date_str:
             return None
         try:
@@ -664,6 +683,7 @@ class AssayImporter:
 class AssayUnit(ModelSQL, ModelView):
     'Assay Unit'
     __name__ = 'assay.unit'
+    _rec_name = 'symbol'
 
     name = fields.Char('Name')         # Percent, g/t, ppm
     symbol = fields.Char('Symbol')     # %, g/t, ppm
@@ -679,7 +699,7 @@ class Assay(ModelSQL, ModelView):
 
     line = fields.Many2One('purchase.line',"Purchase Line")
 
-    reference = fields.Char("Lab Reference")
+    reference = fields.Char("Reference")
     date = fields.Date("Analysis Date")
 
     type = fields.Selection([