- Senn, English Rationalism in the XIXth Century (1906), vol.
- And Mesnil; F, after Wasiel and Senn.) FIG.
- Senn, " Beitrage zur Kenntniss der Flagellaten des Rattenblutes," op. cit.
- Senn, pursuing the methods described by Klebs, has confirmed Chodat's observation of the passage of Raphidium into a Dactylococcus-stage, although he was unable to observe further metamorphosis.