1.
Cranston DW, Rabern L. Planar Graphs have Independence Ratio at least 3/13. Electron. J. Combin. [Internet]. 2016Sep.2 [cited 2026Jun.3];23(3):#P3.45. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i3p45