Muller CHG, Rieger V, Perez Y, Hanson B, Harzsch S : Neurophylogeny of Chaetognatha : Can Neuroanatomical Characters Shed Light on the Phylogenetic Position of Arrow Worms ?. 1st International Congress on Invertebrate Morphology ; 12/2008, DOI:10.1002/jmor.10683

Rieger V, Perez Y, Hanson B, Harzsch S : Neurogenesis in the Arrow Worm Spadella cephaloptera (Chaetognatha). 1st International Congress on Invertebrate Morphology ; 12/2008 ; 01/2008