Added references to bibliography for Sobol

docs/source/bibliography.bib

@@ -801,3 +801,30 @@ @article{GSI
 doi = {10.1214/14-EJS895},
 URL = {https://doi.org/10.1214/14-EJS895}
 }
+
+# Sobol
+@book{saltelli_2008,
+  author = {Saltelli, A.},
+  description = {Global sensitivity analysis: the primer - Andrea Saltelli},
+  isbn = {9780470059975},
+  keywords = {sensitivity statistics},
+  lccn = {2007045551},
+  publisher = {John Wiley},
+  title = {Global sensitivity analysis: the primer},
+  url = {https://onlinelibrary.wiley.com/doi/book/10.1002/9780470725184},
+  year = 2008
+}
+
+@article{saltelli_2002,
+title = {Making best use of model evaluations to compute sensitivity indices},
+journal = {Computer Physics Communications},
+volume = {145},
+number = {2},
+pages = {280-297},
+year = {2002},
+issn = {0010-4655},
+doi = {https://doi.org/10.1016/S0010-4655(02)00280-1},
+url = {https://www.sciencedirect.com/science/article/pii/S0010465502002801},
+author = {Andrea Saltelli},
+keywords = {Sensitivity analysis, Sensitivity measures, Sensitivity indices, Importance measures},
+}

docs/source/sensitivity/sobol.rst

@@ -31,38 +31,33 @@ Here, :math:`N` is the number of Monte Carlo samples and :math:`m` being the num
 
 Compared to "Sobol1993", the "Janon2014" estimator makes more efficient use of model evaluations and produces smaller (better) confidence intervals.
 
-- Sobol1993: Requires :math:`N(m + 1)` model evaluations [1]_.
+- Sobol1993: Requires :math:`N(m + 1)` model evaluations :cite:`saltelli_2008`.
 
 .. math::
    S_{i} = \frac{\mathbb{V}\left[E\left(Y \mid X_{i}\right)\right]}{\mathbb{V}(Y)} = \frac{ (1/N) Y_{A} \cdot Y_{C_{i}}-f_{0}^{2}}{(1 / N) Y_{A} \cdot Y_{A}-f_{0}^{2}}
 
 .. math:: 
    y_{A}=f(A), \quad y_{C_{i}}=f(C_{i}), \quad f_{0}^{2}=\left(\frac{1}{N} \sum_{j=1}^{N} y_{A}^{(j)} \right)^{2}
 
-- Saltelli2002: Requires :math:`N(2m + 2)` model evaluations [2]_.
+- Saltelli2002: Requires :math:`N(2m + 2)` model evaluations :cite:`saltelli_2002`.
 
 2. **Second order indices** (:math:`S_{ij}`)
 
-- Saltelli2002: Requires :math:`N(2m + 2)` model evaluations [2]_.
+- Saltelli2002: Requires :math:`N(2m + 2)` model evaluations :cite:`saltelli_2002`.
 
 3. **Total order indices** (:math:`S_{T_{i}}`)
 
-- Homma1996: Requires :math:`N(m + 1)` model evaluations [1]_.
+- Homma1996: Requires :math:`N(m + 1)` model evaluations :cite:`saltelli_2008`.
 
 .. math:: 
    S_{T_{i}} = 1 - \frac{\mathbb{V}\left[E\left(Y \mid \mathbf{X}_{\sim_{i}}\right)\right]}{\mathbb{V}(Y)} = 1 - \frac{ (1 / N) Y_{B} \cdot Y_{C_{i}}-f_{0}^{2}}{(1 / N) Y_{A} \cdot Y_{A}-f_{0}^{2}}
 
 .. math:: 
    y_{A}=f(A), \quad y_{B}=f(B), \quad y_{C_{i}}=f(C_{i}), \quad f_{0}^{2}=\left(\frac{1}{2N} \sum_{j=1}^{N} y_{A}^{(j)} + y_{B}^{(j)} \right)^{2}
 
-- Saltelli2002: Requires :math:`N(2m + 2)` model evaluations [2]_.
+- Saltelli2002: Requires :math:`N(2m + 2)` model evaluations :cite:`saltelli_2002`.
 
 
-.. [1] Saltelli, A. (2008). Global sensitivity analysis: the primer. 
-        John Wiley. ISBN: 9780470059975
-
-.. [2] Saltelli, A. (2002). Making best use of model evaluations to compute sensitivity indices. (`Link <http://www.andreasaltelli.eu/file/repository/Making_best_use.pdf>`_)
-
 Sobol Class
 ^^^^^^^^^^^^^^^^^^