1. Cornuéjols, G., Pulleyblank, W.R.: Critical graphs, matchings and tours or a hierarchy of relaxations for the travelling salesman problem. Combinatorica 3(1), 36–52 (1983)
2. Cornuéjols, G., Hartvigsen, D., Pulleyblank, W.R.: Packing subgraphs in a graph. Oper. Res. Lett. 1(4), 139–143 (1982)
3. Lovász, L.: A note on factor-critical graphs. Stud. Sci. Math. Hung. 7, 279–280 (1972)
4. Lovász, L., Plummer, M.D.: Matching theory. Ann. Discrete Math. 29 (1986)
5. Lu, H.: Antifactor of regular bipartite graphs. (Nov 2015). Recently completed with the same title by Lu, H., Wang, W., Yan, J.: Discrete mathematics and theoretical computer science, vol. 22, p. 1 (2020). http://arxiv.org/abs/1511.09277v1.pdf