@ARTICLE
        { GKNjea17,
	  AUTHOR = "S. Gog and R. Konow and G. Navarro",
	  TITLE = "Practical Compact Indexes for Top-k Document Retrieval",
          JOURNAL = "ACM Journal of Experimental Algorithmics",
	  YEAR = 2017,
          VOLUME = 22,
	  NUMBER = 1,
	  PAGES = "article 1.2"
        }