Furnas, GW and Deerwester, S. and Dumais, ST and Landauer, TK and Harshman, RA and Streeter, LA and Lochbaum, KE. Information retrieval using a singular value decomposition model of latent semantic structure. Proceedings of the 11th annual international ACM SIGIR conference on Research and development in information retrieval. 465--480, Year 1988.