Catalog of the Scientific Community: Jungius, Joachim
   Basic biographical facts, compiled as part of the Galileo Project.
   http://galileo.rice.edu/Catalog/NewFiles/jungius.html

Joachim Jungius
   Brief biography with an emphasis on his work in logic.
   http://www.ithaca.edu/osman/Courses/190Fa02/hw/history/jungius/jungius.html

MacTutor History of Mathematics: Joachim Jungius
   Biography of this German scientific thinker, by J.J. O'Connor and E.F. Robertson.
   http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Jungius.html