Nested Historical Relations. - Abdullah Uz Tansel; Lucy Garnett (SIGMOD Conference, 1989)

On Roth, Korth, and Silberschatz's Extended Algebra and Calculus for Nested Relational Databases. - Abdullah Uz Tansel; Lucy Garnett (ACM Trans. Database Syst., 1992)

Wrapping Objects. - Lucy Garnett (J. Object Oriented Program., 1997)