| author | date | title | journal / publication | Raikova OI, Falleni A, Justine J-L | 1997 | Spermiogenesis in Paratomella rubra (Platyhelminthes, Acoela): ultrastructural, immunocytochemical, cytochemical studies and phylogenetic implications. | Acta Zool (Stockh) 78: 295-307 |
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