De proportione qua gravia decidentia accelerantur
(lat.)
at The Archimedes Project
[archimedes.mpiwg-berlin.mpg.de/cgi-bin/toc/toc.cgi?step=thumb&dir=gasse_propo_028_la_164]

De motu impresso a motore translato epistulae duae
(lat.)
at The Archimedes Project
[archimedes.mpiwg-berlin.mpg.de/cgi-bin/toc/toc.cgi?dir=gasse_demot_027_la_1642;step=thumb]