Jan Van den Bussche 1-13 MFDBS1991/P001.pdf 1991 MFDBS db/conf/mfdbs/mfdbs91.html#Nussche91 conf/mfdbs/91 db/conf/mfdbs/Nussche91.html journals/jcss/AbiteboulB86 journals/vldb/AbiteboulB95 conf/nf2/AbiteboulBGG87 conf/pods/88 conf/nf2/87 journals/jcss/Bidoit87 conf/edbt/BeeriK90 conf/sigmod/89 journals/cacm/Codd70 journals/is/Colby90 conf/sigmod/Colby89 journals/jcss/FischerSTG85 journals/jacm/GyssensPG89 journals/ipl/GyssensPG90 conf/sigmod/GyssensG88 conf/dbpl/HullS89 conf/pods/JaeschkeS82 books/sp/ParedaensBGG89 journals/tods/RothKS88 journals/is/SchekS86 ... journals/acr/ThomasF86 books/cs/Ullman88 books/cs/Ullman89 journals/jcss/GuchtF88