diff --git a/alexandria/app.py b/alexandria/app.py
index b92d848..4d941c5 100644
--- a/alexandria/app.py
+++ b/alexandria/app.py
@@ -8,12 +8,19 @@ import models
 import pprint
 
 # Initialise Flask
-app = Flask(__name__)    
+app = Flask(__name__)
 app.debug = False
 
 
 @app.route("/drivers", methods = ["GET"])
 def api_drivers():
+    """Return drivers.
+
+    :param nome
+    :type na
+    :returns:  http response
+
+    """
     data = {"drivers" : conf_file.get_drivers()}
     resp = jsonify(data)
     resp.status_code = 200
diff --git a/alexandria/models.py b/alexandria/models.py
index 295590e..9b5801d 100644
--- a/alexandria/models.py
+++ b/alexandria/models.py
@@ -6,6 +6,7 @@ import os
 import re
 
 class Model(object):
+    """Implements Alexandria reference model."""
     def __init__(self):
         
         self.reference_items = []