@INPROCEEDINGS { AUTHOR = "Gonzalo Navarro and Sharma Thankachan", TITLE = "Faster Top-k Document Retrieval in Optimal Space", EDITOR = "O. Kurland and M. Lewenstein and and E. Porat", BOOKTITLE = "20th International Symposium on String Processing and Information Retrieval (SPIRE)", PAGES = "255-262", MONTH = "Oct", YEAR = "2013", ADDRESS = "Jerusalem, Israel", PUBLISHER = "Springer-Verlag", SERIES ="Lecture Notes in Computer Science", NUMBER = "8214", }