@inproceedings {GDEA-297, 
author = {Eppstein, David}, 
year = {2002}, 
title = {Separating Thickness from Geometric Thickness}, 
editor = {Goodrich, Michael T. and Kobourov, Stephen G.}, 
pages =  {pp. 150-161}, 
booktitle =  {Graph Drawing, Irvine, CA, USA, August 26-28, 2002}, 
publisher = {Springer}, 
}