Hubai, T., Kráľ, D., Parczyk, O., & Person, Y. (2019). More non-bipartite forcing pairs. Acta Mathematica Universitatis Comenianae, 88(3), 819-825. Retrieved from http://www.iam.fmph.uniba.sk/amuc/ojs/index.php/amuc/article/view/1279