George G. Robertson, D. Austin Henderson Jr., Stuart K. Card. Buttons as first class objects on an X desktop. In James R. Rhyne, editor, Proceedings of the 4th Annual ACM Symposium on User Interface Software and Technology, UIST 1991, Hilton Head, South Carolina, USA, November 11-13, 1991. pages 35-44, ACM, 1991. [doi]
Abstract is missing.