@ARTICLE 
        { NPPSijfcs11,
	  TITLE = "Stronger Quickheaps",
          AUTHOR = "G. Navarro and R. Paredes and P. Poblete and P. Sanders",
	  JOURNAL = "International Journal of Foundations of Computer Science 
		     (IJFCS)",
          YEAR = 2011,
	  VOLUME = 22,
	  NUMBER = 4,
	  PAGES = "945--969"
        }