@ARTICLE {,
title = {Major components of the Gravity Recommendation System},
author = {G\'abor Tak\'acs and Istv\'an Pil\'aszy and Botty\'an N\'emeth and Domonkos Tikk},
journal = {ACM SIGKDD Explorations Newsletter},
year = {2007},
month = {December},
volume = {9},
number = {2},
pages = {80--83},
}