172
52. Katz,R.H.(1990).“TowardaUnifiedFrameworkforVersionModelinginEngineering
Databases.” 22(4):375-408.
53. Keller,A.M.andJ.D.Ullman(1995).AVersionNumberingSchemewithaUseful
LexicographicalOrder.ProceedingsoftheEleventhInternationalConferenceonData
Engineering,Taipei,Taiwan,IEEEComputerSociety.
54. Knister,M.J.andA.Prakash(1990).DistEdit:Adistributedtoolkitforsupporting
multiplegroupeditors.ProceedingsoftheConferenceonComputerSupportedCoop-
erativeWork(CSCW'90),LosAngeles,California,ACMPress.
55. Kruskal,V.(1984).“ManagingMulti-VersionProgramswithanEditor.”IBMJ.Res.
Develop.28(1):74-81.
56. Lamport,L.(1978).“Time,clocks,andtheorderingofeventsinadistributedsys-
tem.” CACM21(7):558–565.
57. Lauwers,J.C.andK.A.Lantz(1990).Collaborationawarenessinsupportofcollabora-
tiontransparency:Requirementsforthenextgenerationofsharedwindowsystems.
ProceedingsoftheACM/SIGCHIConferenceonHumanfactorsinComputing,Seattle
Washington,ACMPress.
58. Leeman,G.B.(1986).“AFormalApproachtoUndoOperationsinProgrammingLan-
guages.” TOPLAS8(1):50-87.
59. Lie,A.,R.Conradi,etal.(1989).ChangeOrientedVersioning.ESEC(EuropeanSoft-
wareengineeringConference),UniversityofWarwick,Coventry,UK,Springer-Verlag.
60. Maioli,C.,S.Sola,etal.(1994).“ExternalAnchoringforWide-AreaNetworkSupport:
theRHYTHMproject.”ModernPhys.C5(5).
61. Maioli,C.,S.Sola,etal.(1994).VersioningforDistributedHypertextSystems.Pro-
ceedingsoftheHypermedia'94Conference,Pretoria,SouthAfrica,(AvailablebyFTP
atftp.cs.unibo.itas/pub/UBLCS/Versioning.ps.gz).

173
62. Marshall,C.C.,F.G.Halasz,etal.(1991).Aquanet:ahypertexttooltoholdyour
knowledgeinplace.Hypertext'91,SanAntonio,texas.
63. Marshall,C.C.andF.M.Shipman(1993).Searchingforthemissinglink:discovering
implicitstructureinspatialhypertext.Hypetext'93,Seattle,Washington.
64. Marshall,C.C.,F.M.Shipman,etal.(1994).VIKI:spatialhypertextsupportingemer-
gentcollaboration.ECHT'94:ACMEuropeanConferenceonHypermediaTechnology,
Edinburgh,UK.
65. McCreight,E.M.(1985).“Prioritysearchtrees.”SIAMJ.Comput.14(2).
66. Milner,R.andM.Tofte(1991).CommentaryonStandardML.Cambridge,Massachu-
setts,MITPress.
67. Milner,R.,M.Tofte,etal.(1990).TheDefinitionofStandardML.Cambridge,Massa-
chusetts,MITPress.
68. Munch,B.(1993).VersioninginaSoftwareDatabase—TheChangeOrientedWay,
NorwegianInstituteofTechnology.
69. Munson,J.andP.Dewan(1996).AConcurrencyControlFrameworkforCollaborative
Systems.Proceedingsofthe1996ConferenceonComputerSupportedCooperative
Work(CSCW'96),Boston,Massachusetts,ACMPress.
70. Munson,J.P.andP.Dewan(1994).AFlexibleObjectMergingFramework.Proceedings
oftheACMConferenceonComputerSupportedCooperativeWork(CSCW'94),Chapel
Hill,NorthCarolina,ACMPress.
71. Narayanaswamy,K.andN.Goldman(1992)."Lazy"consistency:ABasisforcoopera-
tivesoftwaredevelopment.ProceedingsoftheACMConferenceonComputerSup-
portedCooperativeWork(CSCW'92),Toronto,Ontario,ACMPress.
72. Nelson(1987).ComputerLib/DreamMachines.Redmond,WA.,MicrosoftPress.
73. Nelson,T.H.(1987).LiteraryMachines.Fredricksburg,TheodorH.Nelson.