@conference{RVHE2005,
author = "C. Romero and S. Ventura and C{\'e}sar Herv{\'a}s-Mart{\'i}nez and P.G. Espejo",
address = " ",
booktitle = "VI International Conference on Data Mining (Data Mining05)",
crossref = " ",
editor = " ",
month = " ",
number = " ",
organization = " ",
pages = "205--214",
publisher = "WIT Press",
series = " ",
title = "{R}ule discovery in web-based educational systems using grammar-based genetic programming",
volume = " ",
year = "2005",
}