@misc{Johansson_Severin_(1879–1929)_Om_1912, author={Johansson, Severin (1879–1929)}, copyright={Public Domain}, address={Kjøobenhavn}, address={Kristiania}, howpublished={online}, year={1912}, publisher={Gyldendalske Boghandel Nordisk Forlag}, language={dan}, title={Om konvergensen af de Poincaré'ska o-serierna i hufvudcirkelfallet}, type={Text}, URL={http://www.rcin.org.pl/Content/79959/PDF/WA35_104758_4567_Beretning-19.pdf}, }