diff --git a/GPy/core/sparse_gp.py b/GPy/core/sparse_gp.py
index bac54d8c..4fcade79 100644
--- a/GPy/core/sparse_gp.py
+++ b/GPy/core/sparse_gp.py
@@ -10,11 +10,6 @@ from parameterization.variational import VariationalPosterior, NormalPosterior
 from ..util.linalg import mdot
 
 import logging
-from GPy.inference.latent_function_inference.posterior import Posterior
-from GPy.inference.optimization.stochastics import SparseGPStochastics,\
-    SparseGPMissing
-#no stochastics.py file added! from GPy.inference.optimization.stochastics import SparseGPStochastics,\
-    #SparseGPMissing
 logger = logging.getLogger("sparse gp")
 
 class SparseGP(GP):
@@ -24,6 +19,10 @@ class SparseGP(GP):
     This model allows (approximate) inference using variational DTC or FITC
     (Gaussian likelihoods) as well as non-conjugate sparse methods based on
     these.
+    
+    This is not for missing data, as the implementation for missing data involves
+    some inefficient optimization routine decisions.
+    See missing data SparseGP implementation in py:class:'~GPy.models.sparse_gp_minibatch.SparseGPMiniBatch'.
 
     :param X: inputs
     :type X: np.ndarray (num_data x input_dim)
@@ -66,7 +65,6 @@ class SparseGP(GP):
     def set_Z(self, Z, trigger_update=True):
         if trigger_update: self.update_model(False)
         self.unlink_parameter(self.Z)
-        from ..core import Param
         self.Z = Param('inducing inputs',Z)
         self.link_parameter(self.Z, index=0)
         if trigger_update: self.update_model(True)
@@ -120,7 +118,7 @@ class SparseGP(GP):
         
         For uncertain inputs, the SparseGP bound produces a full covariance structure across D, so for full_cov we 
         return a NxDxD matrix and in the not full_cov case, we return the diagonal elements across D (NxD).
-        This is for both with and without missing data.
+        This is for both with and without missing data. See for missing data SparseGP implementation py:class:'~GPy.models.sparse_gp_minibatch.SparseGPMiniBatch'.
         """
 
         if kern is None: kern = self.kern