DOC Link DOIs to preferred resolver (#10896)

scikit-learn · Apr 1, 2018 · d7b560c · d7b560c
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diff --git a/doc/modules/clustering.rst b/doc/modules/clustering.rst
@@ -1496,7 +1496,7 @@ cluster analysis.
  * Peter J. Rousseeuw (1987). "Silhouettes: a Graphical Aid to the
    Interpretation and Validation of Cluster Analysis". Computational
    and Applied Mathematics 20: 53–65.
-   `doi:10.1016/0377-0427(87)90125-7 <http://dx.doi.org/10.1016/0377-0427(87)90125-7>`_.
+   `doi:10.1016/0377-0427(87)90125-7 <https://doi.org/10.1016/0377-0427(87)90125-7>`_.
 
 
 Advantages
@@ -1589,7 +1589,7 @@ Drawbacks
 
  *  Caliński, T., & Harabasz, J. (1974). "A dendrite method for cluster
     analysis". Communications in Statistics-theory and Methods 3: 1-27.
-    `doi:10.1080/03610926.2011.560741 <http://dx.doi.org/10.1080/03610926.2011.560741>`_.
+    `doi:10.1080/03610926.2011.560741 <https://doi.org/10.1080/03610926.2011.560741>`_.
 
 .. _contingency_matrix:
 

diff --git a/sklearn/manifold/spectral_embedding_.py b/sklearn/manifold/spectral_embedding_.py
@@ -208,7 +208,7 @@ def spectral_embedding(adjacency, n_components=8, eigen_solver=None,
     * Toward the Optimal Preconditioned Eigensolver: Locally Optimal
       Block Preconditioned Conjugate Gradient Method
       Andrew V. Knyazev
-      http://dx.doi.org/10.1137%2FS1064827500366124
+      https://doi.org/10.1137%2FS1064827500366124
     """
     adjacency = check_symmetric(adjacency)
 

diff --git a/sklearn/metrics/classification.py b/sklearn/metrics/classification.py
@@ -499,7 +499,7 @@ def matthews_corrcoef(y_true, y_pred, sample_weight=None):
     ----------
     .. [1] `Baldi, Brunak, Chauvin, Andersen and Nielsen, (2000). Assessing the
        accuracy of prediction algorithms for classification: an overview
-       <http://dx.doi.org/10.1093/bioinformatics/16.5.412>`_
+       <https://doi.org/10.1093/bioinformatics/16.5.412>`_
 
     .. [2] `Wikipedia entry for the Matthews Correlation Coefficient
        <https://en.wikipedia.org/wiki/Matthews_correlation_coefficient>`_