References
Confocal image of the tapeworm scolex and neck showing the musculature (green) and cell nuclei (blue). © A Gruhl & PD Olson
PD Olson (2008). Hox genes and the parasitic flatworms: new opportunities, challenges and lessons from the free-living. Parasitology International 57:8-17.
PD Olson, DTJ Littlewood, RA Bray and J Mariaux (2001). Interrelationships and evolution of the tapeworms (Platyhelminthes: Cestoda). Molecular Phylogenetics and Evolution 18:443-467.