| author: | Sluys R, Kawakatsu M, & Ponce de León R |
| title: | Morphological stasis in an old and widespread group of species: Contribution to the taxonomy and biogeography of the genus Girardia (Platyhelminthes, Tricladida, Paludicola) |
| publication: | Studies on Neotropical Fauna and Environment, 40(2):155-180 |
| year: | 2005 |