Rindal, E. & Gammelmo, Ø., 2007. On the family Diadocidiidae (Diptera, Sciaroidea) in Norway. Norwegian Journal of Entomology, 54, pp.69-74. Available at: http://www.online-keys.net/sciaroidea/add01/Rindal_&_Gammelmo_Diadociidae_Norway.pdf.