Munindar P. Singh Semantical Considerations on Workflows: An Algebra for Intertask Dependencies. 5 1995 DBPL db/conf/dbpl/dbpl95.html#Singh95 conf/dbpl/95 DBPL1995/X08.pdf journals/tods/AgrawalAS93 conf/vldb/AttieSSR93 books/aw/BernsteinHG87 conf/dbpl/BonnerKC93 journals/sigmod/BreitbartDSSW93 books/mk/elmagarmid92/ChrysanthisR92 conf/sigmod/DayalGHKS93 books/mk/Elmagarmid92 books/el/leeuwen90/Emerson90 conf/sigmod/Garcia-MolinaS87 ... books/mk/GrayR93 conf/vldb/Gray81 conf/ride/Gunthor93 journals/debu/Hsu93 ... ... journals/tcs/Lipeck90 conf/pdis/Nodine93 conf/jelia/Pratt90 conf/comad/SinghT94 conf/sigmod/SinghTW94 conf/icde/Singh96 books/mk/elmagarmid92/WachterR92