Amril Syalim Yoshiaki Hori Kouichi Sakurai Grouping Provenance Information to Improve Efficiency of Access Control. 51-59 2009 ISA http://dx.doi.org/10.1007/978-3-642-02617-1_6 conf/sersc-isa/2009 db/conf/sersc-isa/isa2009.html#SyalimHS09