conf/pods/91 Jan Van den Bussche Jan Paredaens The Expressive Power of Structured Values in Pure OODB's. 291-299 1991 PODS db/conf/pods/pods91.html#BusscheP91 http://doi.acm.org/10.1145/113413.113440 journals/anthology/cd1-3:PODS91/P291.PDF journals/anthology/dvd1:text/1-3/PODS91/P291.PDF journals/vldb/AbiteboulB95 ... conf/sigmod/AbiteboulK89 journals/jcss/AbiteboulV90 journals/dke/Beeri90 conf/sigmod/89 conf/pods/GyssensPG90 journals/csur/HullK87 conf/sigmod/HullS89 conf/vldb/HullY90 ... journals/jacm/KiferLW95 conf/pods/KuperV84 conf/pods/LecluseR89 ... books/cs/NaqviT89 conf/pods/Ullman87 books/cs/Ullman88 journals/tse/VarvelS89 conf/dood/Zaniolo89