@Article{JLP14,
	author	=	{Foucaud, Florent, Laihonen, Tero and Parreau, Aline},
	title	=	{An improved lower bound for $(1,\leq 2)$-identifying codes in the king grid},
	journal =	{Advances in Mathematics of Communications},
	year	=	{2014},
volume = {8},
number ={1},
pages={35--52},
DOI={10.3934/amc.2014.8.35}
}