Text Compression by Context Tree Weighting. - Jan Åberg; Yuri M. Shtarkov (Data Compression Conference, 1997)

Towards Understanding and Improving Escape Probabilities in PPM. - Jan Åberg; Yuri M. Shtarkov; Ben J. M. Smeets (Data Compression Conference, 1997)

Multialphabet coding with separate alphabet description. - Jan Åberg; Yuri M. Shtarkov; Ben J. M. Smeets (SEQUENCES, 1997)

Non-Uniform PPM and Context Tree Models. - Jan Åberg; Yuri M. Shtarkov; Ben J. M. Smeets (Data Compression Conference, 1998)

On Taking Advantage of Similarities between Parameters in Lossless Sequential Coding. - Jan Åberg (Data Compression Conference, 1999)

A Universal Source Coding Perspective on PPM. - Jan Åberg (1999)