The Virtual Laboratory
Max-Planck-Institute for the History of Science, Berlin <http://vlp.mpiwg-berlin.mpg.de/>
Reichert, C. n. d. Catalogue F7: Microscopes et appareils auxiliaires. Vienne (Autriche) (Collection Paolo Brenni)
http://vlp.mpiwg-berlin.mpg.de/library/data/lit17687/