Jerry Fowler Donald G. Baker Ross Dargahi Vram Kouramajian Hillary Gilson Kevin Brook Long Cynthia Petermann G. Anthony Gorry Experience with the Virtual Notebook System: Abstraction in Hypertext. 133-143 1994 CSCW http://doi.acm.org/10.1145/192844.192892 db/conf/cscw/cscw1994.html#FowlerBDKGLPG94