Reference

Michaela Panzenböck, Johann Waringer (1997): A key to fifth instar larvae of Halesus radiatus Curtis 1834, Halesus digitatus Schrank 1781 and Halesus tesselatus Rambur 1842 (Trichoptera: Limnephilidae), based on Austrian material. – Aquatic Insects – 19: 65 - 73.