Saari, Timo, Markku Poutanen, Veikko Saaranen, Harri Kaartinen, Antero Kukko, and Sonja Lahtinen. 2015. “Height Determination Techniques for the Next National Height System of Finland - a Case Study”. Geodesy and Cartography 41 (4):145-55. https://doi.org/10.3846/20296991.2015.1120387.