カクタスグラフ
↑ El-Mallah, Ehab; Colbourn, Charles J. (1988), “The complexity of some edge deletion problems”, IEEE Transactions on Circuits and Systems 35 (3): 354–362, doi:10.1109/31.1748
↑ Călinescu, Gruia; Fernandes, Cristina G; Finkler, Ulrich; Karloff, Howard (2002), “A Better Approximation Algorithm for Finding Planar Subgraphs”, Journal of Algorithms, 2 27: 269– 302, doi:10.1006/jagm.1997.0920
↑ Lovász, L.; Plummer, M.D. (2009), Matching Theory, AMS Chelsea Publishing Series, ISBN 9780821847596
↑ Rosa, A. (1988), “Cyclic Steiner Triple Systems and Labelings of Triangular Cacti”, Scientia 1: 87--95