1.
Junnila V, Laihonen T. Optimal Lower Bound for 2-Identifying Codes in the Hexagonal Grid. Electron. J. Combin. [Internet]. 2012Jun.13 [cited 2026Mar.27];19(2):P38. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v19i2p38