1. A study of the gravity anomaly associated with Lake Lappajärvi, Finland;Elo;Geophys. Dep. Geol. Surv. Finl. Rep. Q20/21/1976/2,1976
2. The formation of large impact structures and constraints on the nature of Siljan;Grieve,1988
3. Gravity survey of Finland in the years 1945–1960;Honkasalo;Finnish Geodetic Inst. Publ.,1962
4. Korhonen, J. and Airo, M-L., Aeromagnetic maps Q22.812/ 2313/1982 and Q22.812/2314/82. Geol. Surv. Finl.
5. Lake Lappajärvi, a meteorite impact site in western Finland;Lehtinen;Geol. Surv. Finl. Bull.,1976