@article{2008,
  author    = {- -},
  title     = {Demonstratio, quod manente eadem Elevatione Mortarii, jactus sint viribus proportionales},
  url       = {http://edoc.bbaw.de/oa/series/rejNZNkFxlJrQ/PDF/25rIBo1IPQfnI.pdf},
  year      = {2008},
}