Safeguarding digital library contents and users: Digital watermarkingFred MintzerJeffrey Lotspiechet al.1997D-Lib Magazine
Safeguarding digital library contents and users: Assuring convenient security and data qualityH.M. GladneyJ.B. Lotspiech1997D-Lib Magazine
On finding non-intersecting straightline connections of grid points to the boundaryYitzhak BirkJeffrey B Lotspiech1992Journal of Algorithms