@ARTICLE {
        BCGGKNOPTjcss20,
        TITLE = "Block Trees",
        AUTHOR = "D. Belazzougui and M. C{\'a}ceres and T. Gagie and 
		  P. Gawrychowski and J. K{\"a}rkk{\"a}inen and G. Navarro and 
		  A. Ord{\'o\~n}ez and S. J. Puglisi and Y. Tabei",
        JOURNAL = "Journal of Computer and System Sciences",
        YEAR = 2021,
	VOLUME = 117,
	PAGES = "1--22"
        }