References
- Indag. Math. v.35 The existence of 1-factors in line graphs, squares and total graphs G.Chartrand;A.D. Polimeni;M.J. Stewart
- Proc. 21st Annual IEEE Symposium on Foundations of Computer Science An O(√( lVl· lEl)) algorithm for finding a maximum matching in general graphs S. Micali;V. Vazirani