@article{02096928, title = {On maximal ot-subsets of the Euclidean plane.}, journal = {Georgian Mathematical Journal}, volume = {10}, year = {2003}, pages = {127-131}, zbl = {1065.52002}, language = {en}, url = {http://dml.mathdoc.fr/item/02096928} }
Kharazishvili, A. On maximal ot-subsets of the Euclidean plane.. Georgian Mathematical Journal, Tome 10 (2003) pp. 127-131. http://gdmltest.u-ga.fr/item/02096928/