Otto Rauh Eberhard Stickel Searching for Compositions in ER Schemes. 74-84 1993 ER db/conf/er/er93.html#RauhS93 conf/er/93 er93/ER93-P075.pdf db/conf/er/RauhS93.html journals/csur/BatiniL86 books/bc/BatiniCN92 journals/tods/Chen76 journals/cacm/Codd70 books/aw/Date90 books/bc/ElmasriN89 books/cs/Maier83 ... conf/dexa/Rauh92 ... ... books/cs/Ullman88 conf/er/WongK79