1. Ahmadi, B., Alinaghipour, F., Cavers, M.S., Fallat, S.M., Meagher, K., Nasserasr, S.: Minimum number of distinct eigenvalues of graphs. Electron. J. Linear Algebra 26, 673–691 (2013)
2. Ahn, J., Alar, C., Bjorkman, B., Butler, S., Carlson, J., Goodnight, A., Knox, H., Monroe, C., Wigal, M.C.: Ordered multiplicity inverse eigenvalue problem for graphs on six vertices. Electron. J. Linear Algebra 37, 316–358 (2021)
3. Arnol’d, V.I.: On matrices depending on parameters (Russian). Uspehi Mat. Nauk. 26, 101–114 (1971). (English translation in Russ. Math. Surv. 26, 29–43 (1971))
4. Barrett, W., Fallat, S., Hall, H.T., Hogben, L., Lin, J.C.-H., Shader, B.L.: Generalizations of the strong Arnold property and the minimum number of distinct eigenvalues of a graph. Electron. J. Comb. 24(2), 1–28 (2017)
5. Barrett, W., Butler, S., Fallat, S.M., Hall, H.T., Hogben, L., Lin, J.C.-H., Shader, B.L., Young, M.: The inverse eigenvalue problem of a graph: multiplicities and minors. J. Comb. Theory Ser. B 142, 276–306 (2020)