Lossless Compression of Grayscale Images via Context Tree Weighting. - Nicklas Ekstrand (Data Compression Conference, 1996)

Weighting of Double Exponential Distributed Data in Lossless Image Compression. - Nicklas Ekstrand; Ben J. M. Smeets (Data Compression Conference, 1998)

Some Notes on the Context Mapping Function in Lossless Data Compression. - Nicklas Ekstrand; Ben J. M. Smeets (Data Compression Conference, 2000)

The Qualitative Modeling and Compression of the Request Sequences in ARQ Protocols. - Nicklas Ekstrand; Bela Rathonyi; Yuri M. Shtarkov; Ben J. M. Smeets (Data Compression Conference, 2001)

Universal Lossless Source Coding Techniques for Images and Short Data Sequences. - Nicklas Ekstrand (2001)