A Lower Bound for Hellbronn's Triangle Problem in <i>d</i> Dimensions.

Gill Barequet A Lower Bound for Hellbronn's Triangle Problem in <i>d</i> Dimensions. 76-81 1999 SODA http://doi.acm.org/10.1145/314500.314535 db/conf/soda/soda99.html#Barequet99