A Selective Undo Mechanism for Graphical User Interfaces Based on Command Objects.

Thomas Berlage A Selective Undo Mechanism for Graphical User Interfaces Based on Command Objects. 269-294 1994 1 ACM Trans. Comput.-Hum. Interact. 3 db/journals/tochi/tochi1.html#Berlage94 http://doi.acm.org/10.1145/196699.196721