Jorma Rissanen Independent Components of Relations. 317-325 TODS2/P317.PDF 1977 2 ACM Trans. Database Syst. 4 db/journals/tods/tods2.html#Rissanen77 http://doi.acm.org/10.1145/320576.320580 conf/ifip/Armstrong74 conf/sigmod/BeeriFH77 ... journals/cacm/Codd70 persons/Codd71a conf/ifip/Codd74 ... ... conf/sigmod/Heath71