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@Misc{Friendly-etal2011carme,
author = {Michael Friendly and Heather Turner and David Firth and Achim Zeileis},
title = {Advances in Visualizing Categorical Data Using the vcd, gnm and vcdExtra Packages
in R},
year = {2011},
month = {feb},
howpublished = {Correspondence Analysis and Related Methods (CARME 2011)},
note = {Rennes, France},
url = {http://www.datavis.ca/papers/adv-vcd-4up.pdf},
}