José A. Pino A Visual Approach to Versioning for Text Co-Authoring. [Citation Graph (0, 0)][DBLP] Interacting with Computers, 1996, v:8, n:4, pp:299-310 [Journal]
Leah K. Hennings, Nong Ye Interaction of Screen Distances, Screen Letter Heights and Source Document Distances. [Citation Graph (0, 0)][DBLP] Interacting with Computers, 1996, v:8, n:4, pp:311-322 [Journal]