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Databases.” 22(4): 375-408.
53. Keller, A. M. and J. D. Ullman (1995).A Version Numbering Scheme with a Useful
Lexicographical Order.Proceedings of the Eleventh International Conference on Data
Engineering, Taipei, Taiwan, IEEE Computer Society.
54. Knister, M. J. and A. Prakash (1990).DistEdit: A distributed toolkit for supporting
multiple group editors.Proceedings of the Conference on Computer Supported Coop-
erative Work (CSCW '90), Los Angeles, California, ACM Press.
55. Kruskal, V. (1984). “Managing Multi-Version Programs with an Editor.”IBM J. Res.
Develop.28(1): 74-81.
56. Lamport, L. (1978). “Time, clocks, and the ordering of events in a distributed sys-
tem.” CACM21(7): 558–565.
57. Lauwers, J. C. and K. A. Lantz (1990).Collaboration awareness in support of collabora-
tion transparency: Requirements for the next generation of shared window systems.
Proceedings of the ACM/SIGCHI Conference on Human factors in Computing, Seattle
Washington, ACM Press.
58. Leeman, G. B. (1986). “A Formal Approach to Undo Operations in Programming Lan-
guages.” TOPLAS8(1): 50-87.
59. Lie, A., R. Conradi, et al. (1989).Change Oriented Versioning.ESEC (European Soft-
ware engineering Conference), University of Warwick, Coventry, UK, Springer-Verlag.
60. Maioli, C., S. Sola, et al. (1994). “External Anchoring for Wide-Area Network Support:
the RHYTHM project.” Modern Phys. C5(5).
61. Maioli, C., S. Sola, et al. (1994).Versioning for Distributed Hypertext Systems.Pro-
ceedings of the Hypermedia '94 Conference, Pretoria, South Africa, (Available by FTP
at ftp.cs.unibo.it as /pub/UBLCS/Versioning.ps.gz).
