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Nikandish, R., Nikmehr, M.J. and Hosseini, S.M. 2019. On the planarity and perfectness of annihilator ideal graphs. Tamkang Journal of Mathematics. 50, 4 (Dec. 2019), 361-369. DOI:https://doi.org/10.5556/j.tkjm.50.2019.2707.