diff --git a/htdocs/commande/class/api_orders.class.php b/htdocs/commande/class/api_orders.class.php
index fb044b1fafa..40732fbd045 100644
--- a/htdocs/commande/class/api_orders.class.php
+++ b/htdocs/commande/class/api_orders.class.php
@@ -52,7 +52,7 @@ class Orders extends DolibarrApi
     }
 
     /**
-     * Get properties of an order object
+     * Get properties of an order object by id
      *
      * Return an array with order informations
      *
@@ -64,26 +64,97 @@ class Orders extends DolibarrApi
      */
     public function get($id, $contact_list = 1)
     {
-		if(! DolibarrApiAccess::$user->rights->commande->lire) {
-			throw new RestException(401);
-		}
+        return $this->_fetch($id, '', '', '', $contact_list);
+    }
 
-        $result = $this->commande->fetch($id);
+    /**
+     * Get properties of an order object by ref
+     *
+     * Return an array with order informations
+     *
+     * @param       string		$ref			Ref of object
+     * @param       int         $contact_list  0: Returned array of contacts/addresses contains all properties, 1: Return array contains just id
+     * @return 	array|mixed data without useless information
+     *
+     * @url GET    byRef/{ref}
+     *
+     * @throws 	RestException
+     */
+    public function getByRef($ref, $contact_list = 1)
+    {
+        return $this->_fetch('', $ref, '', '', $contact_list);
+    }
+
+    /**
+     * Get properties of an order object by ref_ext
+     *
+     * Return an array with order informations
+     *
+     * @param       string		$ref_ext			External reference of object
+     * @param       int         $contact_list  0: Returned array of contacts/addresses contains all properties, 1: Return array contains just id
+     * @return 	array|mixed data without useless information
+     *
+     * @url GET    byRefExt/{ref_ext}
+     *
+     * @throws 	RestException
+     */
+    public function getByRefExt($ref_ext, $contact_list = 1)
+    {
+        return $this->_fetch('', '', $ref_ext, '', $contact_list);
+    }
+
+    /**
+     * Get properties of an order object by ref_int
+     *
+     * Return an array with order informations
+     *
+     * @param       string		$ref_int			Internal reference of object
+     * @param       int         $contact_list  0: Returned array of contacts/addresses contains all properties, 1: Return array contains just id
+     * @return 	array|mixed data without useless information
+     *
+     * @url GET    byRefInt/{ref_int}
+     *
+     * @throws 	RestException
+     */
+    public function getByRefInt($ref_int, $contact_list = 1)
+    {
+        return $this->_fetch('', '', '', $ref_int, $contact_list);
+    }
+
+    /**
+     * Get properties of an order object
+     *
+     * Return an array with order informations
+     *
+     * @param       int         $id            ID of order
+	 * @param		string		$ref			Ref of object
+	 * @param		string		$ref_ext		External reference of object
+	 * @param		string		$ref_int		Internal reference of other objec
+     * @param       int         $contact_list  0: Returned array of contacts/addresses contains all properties, 1: Return array contains just id
+     * @return 	array|mixed data without useless information
+     *
+     * @throws 	RestException
+     */
+    private function _fetch($id, $ref = '', $ref_ext = '', $ref_int = '', $contact_list = 1)
+    {
+        if(! DolibarrApiAccess::$user->rights->commande->lire) {
+            throw new RestException(401);
+        }
+
+        $result = $this->commande->fetch($id, $ref, $ref_ext, $ref_int);
         if( ! $result ) {
             throw new RestException(404, 'Order not found');
         }
 
-		if( ! DolibarrApi::_checkAccessToResource('commande', $this->commande->id)) {
-			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
-		}
-
-		// Add external contacts ids
-		$this->commande->contacts_ids = $this->commande->liste_contact(-1, 'external', $contact_list);
-		$this->commande->fetchObjectLinked();
-		return $this->_cleanObjectDatas($this->commande);
-	}
-
+        if( ! DolibarrApi::_checkAccessToResource('commande', $this->commande->id)) {
+            throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
+        }
 
+        // Add external contacts ids
+        $this->commande->contacts_ids = $this->commande->liste_contact(-1, 'external', $contact_list);
+        $this->commande->fetchObjectLinked();
+        return $this->_cleanObjectDatas($this->commande);
+    }
 
     /**
      * List orders