docs: add missing references and notes

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Author: kgryte

lib/node_modules/@stdlib/stats/base/ndarray/dmeankbn/README.md

@@ -110,6 +110,18 @@ console.log( v );
 
 <!-- /.examples -->
 
+* * *
+
+<section class="references">
+
+## References
+
+-   Neumaier, Arnold. 1974. "Rounding Error Analysis of Some Methods for Summing Finite Sums." _Zeitschrift Für Angewandte Mathematik Und Mechanik_ 54 (1): 39–51. doi:[10.1002/zamm.19740540106][@neumaier:1974a].
+
+</section>
+
+<!-- /.references -->
+
 <!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
 
 <section class="related">
@@ -124,6 +136,8 @@ console.log( v );
 
 [arithmetic-mean]: https://en.wikipedia.org/wiki/Arithmetic_mean
 
+[@neumaier:1974a]: https://doi.org/10.1002/zamm.19740540106
+
 </section>
 
 <!-- /.links -->

lib/node_modules/@stdlib/stats/base/ndarray/dmeankbn2/README.md

@@ -110,6 +110,18 @@ console.log( v );
 
 <!-- /.examples -->
 
+* * *
+
+<section class="references">
+
+## References
+
+-   Klein, Andreas. 2005. "A Generalized Kahan-Babuška-Summation-Algorithm." _Computing_ 76 (3): 279–93. doi:[10.1007/s00607-005-0139-x][@klein:2005a].
+
+</section>
+
+<!-- /.references -->
+
 <!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
 
 <section class="related">
@@ -124,6 +136,8 @@ console.log( v );
 
 [arithmetic-mean]: https://en.wikipedia.org/wiki/Arithmetic_mean
 
+[@klein:2005a]: https://doi.org/10.1007/s00607-005-0139-x
+
 </section>
 
 <!-- /.links -->

lib/node_modules/@stdlib/stats/base/ndarray/dnanmeanpw/README.md

@@ -79,6 +79,7 @@ The function has the following parameters:
 ## Notes
 
 -   If provided an empty one-dimensional ndarray, the function returns `NaN`.
+-   In general, pairwise summation is more numerically stable than ordinary recursive summation (i.e., "simple" summation), with slightly worse performance. While not the most numerically stable summation technique (e.g., compensated summation techniques such as the Kahan–Babuška-Neumaier algorithm are generally more numerically stable), pairwise summation strikes a reasonable balance between numerical stability and performance. If either numerical stability or performance is more desirable for your use case, consider alternative summation techniques.
 
 </section>
 

lib/node_modules/@stdlib/stats/base/ndarray/meankbn/README.md

@@ -109,6 +109,18 @@ console.log( v );
 
 <!-- /.examples -->
 
+* * *
+
+<section class="references">
+
+## References
+
+-   Neumaier, Arnold. 1974. "Rounding Error Analysis of Some Methods for Summing Finite Sums." _Zeitschrift Für Angewandte Mathematik Und Mechanik_ 54 (1): 39–51. doi:[10.1002/zamm.19740540106][@neumaier:1974a].
+
+</section>
+
+<!-- /.references -->
+
 <!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
 
 <section class="related">
@@ -123,6 +135,8 @@ console.log( v );
 
 [arithmetic-mean]: https://en.wikipedia.org/wiki/Arithmetic_mean
 
+[@neumaier:1974a]: https://doi.org/10.1002/zamm.19740540106
+
 </section>
 
 <!-- /.links -->

lib/node_modules/@stdlib/stats/base/ndarray/meankbn2/README.md

@@ -109,6 +109,18 @@ console.log( v );
 
 <!-- /.examples -->
 
+* * *
+
+<section class="references">
+
+## References
+
+-   Klein, Andreas. 2005. "A Generalized Kahan-Babuška-Summation-Algorithm." _Computing_ 76 (3): 279–93. doi:[10.1007/s00607-005-0139-x][@klein:2005a].
+
+</section>
+
+<!-- /.references -->
+
 <!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
 
 <section class="related">
@@ -123,6 +135,8 @@ console.log( v );
 
 [arithmetic-mean]: https://en.wikipedia.org/wiki/Arithmetic_mean
 
+[@klein:2005a]: https://doi.org/10.1007/s00607-005-0139-x
+
 </section>
 
 <!-- /.links -->

lib/node_modules/@stdlib/stats/base/ndarray/meanpw/README.md

@@ -110,6 +110,18 @@ console.log( v );
 
 <!-- /.examples -->
 
+* * *
+
+<section class="references">
+
+## References
+
+-   Higham, Nicholas J. 1993. "The Accuracy of Floating Point Summation." _SIAM Journal on Scientific Computing_ 14 (4): 783–99. doi:[10.1137/0914050][@higham:1993a].
+
+</section>
+
+<!-- /.references -->
+
 <!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
 
 <section class="related">
@@ -124,6 +136,8 @@ console.log( v );
 
 [arithmetic-mean]: https://en.wikipedia.org/wiki/Arithmetic_mean
 
+[@higham:1993a]: https://doi.org/10.1137/0914050
+
 </section>
 
 <!-- /.links -->

lib/node_modules/@stdlib/stats/base/ndarray/mediansorted/README.md

@@ -63,6 +63,7 @@ The function has the following parameters:
 ## Notes
 
 -   If provided an empty ndarray, the function returns `NaN`.
+-   The one-dimensional input ndarray must be sorted in either **strictly** ascending or descending order.
 
 </section>
 

lib/node_modules/@stdlib/stats/base/ndarray/minsorted/README.md

@@ -63,7 +63,7 @@ The function has the following parameters:
 ## Notes
 
 -   If provided an empty one-dimensional ndarray, the function returns `NaN`.
--   The input ndarray must be sorted in either ascending or descending order.
+-   The one-dimensional input ndarray must be sorted in either **strictly** ascending or descending order.
 
 </section>
 

lib/node_modules/@stdlib/stats/base/ndarray/smaxabssorted/README.md

@@ -64,6 +64,7 @@ The function has the following parameters:
 ## Notes
 
 -   If provided an empty one-dimensional ndarray, the function returns `NaN`.
+-   The one-dimensional input ndarray must be sorted in either **strictly** ascending or descending order.
 
 </section>