Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ari Viljanen and Eija Tanskanen,High-latitude magnetic fields and their time derivatives : interhemispheric similarities,"EPS : Earth, Planets and Space",13438832,Tokyo : Terra Scientific Pub. Co,2013,65,1,45-49,https://cir.nii.ac.jp/crid/1520854805811181184,