Pettersen, B.R., Bilker-Koivula, M., Breili, K., Engfeldt, A., Falk, R., Gitlein, O., Gjevestad, J.G.O., Hoppe, W., Lysaker, D.I., Mäkinen, J., Omang, O.C.D., Reinhold, A. and Timmen, L. 2010. An Accuracy Assessment of Absolute Gravimetric Observations in Fennoscandia. Nordic Journal of Surveying and Real Estate Research. 7, 1 (Oct. 2010).