Implemented is_matching_covered() and is_bicritical()

src/doc/en/reference/graphs/index.rst

@@ -84,6 +84,7 @@ Libraries of algorithms
    sage/graphs/spanning_tree
    sage/graphs/pq_trees
    sage/graphs/trees
+   sage/graphs/matching
    sage/graphs/matchpoly
    sage/graphs/genus
    sage/graphs/lovasz_theta

src/doc/en/reference/references/index.rst

@@ -4666,6 +4666,12 @@ REFERENCES:
              measures*. Publications Mathématiques de l'Institut des
              Hautes Études Scientifiques 98(1)  (2003), pp. 167-212.
 
+.. [LZ2001] Dingjun Lou and Ning Zhong. *A highly efficient algorithm to
+            determine bicritical graphs.* In: Wang, J. (eds) Computing and
+            Combinatorics. Lecture Notes in Computer Science, vol 2108,
+            pages 349--356. Springer, Berlin, Heidelberg, 2001,
+            :doi:`10.1007/3-540-44679-6_38`.
+
 .. [LZ2004] S. Lando and A. Zvonkine, "Graphs on surfaces and their
             applications", Springer-Verlag, 2004.
 
@@ -6510,6 +6516,10 @@ REFERENCES:
 .. [TTWL2009] Trebst, Troyer, Wang and Ludwig, A short introduction to
               Fibonacci anyon models, :arxiv:`0902.3275`.
 
+.. [Tut1947] W.T. Tutte. *The factorization of linear graphs.* Journal of the
+             London Mathematical Society, vol. s1-22, issue 2, pages 107--111,
+             April 1947. :doi:`10.1112/jlms/s1-22.2.107`.
+
 .. [Tur1974] \R. J. Turyn *Hadamard matrices, Baumert-Hall units,
              four-symbol sequences, pulse compression, and surface wave encodings*.
              Journal of Combinatorial Theory, Series A 16.3 (1974), pp 313–333.