Tor G. Karling. Haplopharynx rostratus Meixner (Turbellaria) mit den Nemertinen verglichen. „Journal of Zoological Systematics and Evolutionary Research”. 3 (1-2), s. 1-18, 1965. DOI: 10.1111/j.1439-0469.1965.tb00424.x. (niem.).
Ernest R. Schockaert. Marine Macrostomorpha (Platyhelminthes, Rhabditophora) from the Algarve (Southern Portugal). „Zootaxa”. 3872 (5), s. 577–590, 2014. DOI: 10.11646/zootaxa.3872.5.8. (ang.).
itis.gov
Haplopharyngida, [w:] Integrated Taxonomic Information System(ang.).