1. Ahlberg, P. 1980: Early Cambrian trilobites from Mount Luopakte, northern Sweden. Sveriges Geologiska Undersökning C765, 1–12.
2. Ahlberg, P. 1981: Ptychopariid trilobites in the Lower Cambrian of Scandinavia. In M. E. Taylor (ed.) Short Papers for the Second International Symposium on the Cambrian System. U.S. Geological Survey Open-File Report 81–743, 5–7.
3. Redescription of a Lower Cambrian eodiscid trilobite from Norway;Ahlberg P.;Norsk Geologisk Tidsskrift,1983
4. Lower Cambrian trilobites and biostratigraphy of Scandinavia;Ahlberg P.;Lund Publications in Geology,1984
5. Ahlberg, P. 1985: Lower Cambrian trilobite faunas from the Scandinavian Caledonides–a review. In Gee, D. G. & Sturt, B. A. (eds): The Caledonide Orogen – Scandinavia and Related Areas, Part 1, 339–346. Wiley, Chichester.