Alan Said Brijnesh J. Jain Sascha Narr Till Plumbaum Users and Noise: The Magic Barrier of Recommender Systems. 237-248 2012 UMAP https://doi.org/10.1007/978-3-642-31454-4_20 conf/um/2012 db/conf/um/umap2012.html#SaidJNP12