Published in Archiv for mathematik og naturvidenskab, in 1898, in volume 20, issue 2, pages 1-11

Created: 2012-02-13, modified: 2012-03-23

Published in Archiv for Mathematik og Naturvidenskab, in 1898, in volume 20, issue 4, pages 1-43

Created: 2014-09-04, modified: 2014-09-04