@article{GDZPPN000363839, title = {Note on Induced Subgraphs of the Unit Distance Graph En.}, journal = {Discrete \& computational geometry}, volume = {4}, year = {1989}, pages = {15-18}, zbl = {0652.05019}, url = {http://dml.mathdoc.fr/item/GDZPPN000363839} }
Maehara, H. Note on Induced Subgraphs of the Unit Distance Graph En.. Discrete & computational geometry, Tome 4 (1989) pp. 15-18. http://gdmltest.u-ga.fr/item/GDZPPN000363839/