On Roth, Korth, and Silberschatz's Extended Algebra and Calculus for Nested Relational Databases.

Abdullah Uz Tansel Lucy Garnett On Roth, Korth, and Silberschatz's Extended Algebra and Calculus for Nested Relational Databases. 374-383 1992 17 ACM Trans. Database Syst. 2 db/journals/tods/tods17.html#TanselG92 http://doi.acm.org/10.1145/128903.128908 db/journals/tods/TanselG92.html TODS17/P374.PDF ... ... ... journals/tods/RothKS88 ... books/cs/Ullman82