Hierarchical Schemata for Relational Databases.

Y. Edmund Lien Hierarchical Schemata for Relational Databases. 48-69 TODS6/P048.PDF 1981 6 ACM Trans. Database Syst. 1 db/journals/tods/tods6.html#Lien81 http://doi.acm.org/10.1145/319540.319546 db/journals/tods/Lien81.html journals/tods/AhoBU79 journals/tods/Beeri80 conf/vldb/BeeriBG78 conf/sigmod/BeeriFH77 journals/tods/Bernstein76 journals/tods/Chen76 journals/cacm/Codd70 persons/Codd71a books/aw/Date77 journals/tods/Delobel78 journals/tods/Fagin77 conf/vldb/Fagin77 conf/vldb/Lien79 journals/jacm/Mendelzon79 conf/mfcs/Rissanen78 journals/jacm/Sagiv80 ... ...