Practical uses of a model of APL. - Kenneth E. Iverson; Arthur T. Whitney (APL, 1982)

The one tree (breaking out of the workspace). - Stephen Taylor; Arthur T. Whitney (APL, 1984)

APL ? - Roger K. W. Hui; Kenneth E. Iverson; Eugene E. McDonnell; Arthur T. Whitney (APL, 1990)

Lots o' Ticks: Real-Time High Performance Time Series Queries on Billions of Trades and Quotes. - Arthur T. Whitney; Dennis E. Shasha (SIGMOD Conference, 2001)