1. Wrack fauna of Sweden and Finland, Ecology and Chorology;Backlund;Opusc. ent.,1945a
2. Larvae and pupae of Heterochila buccata Fall. compared with the supposed larva of Helcomyza ustulata Curtis. (Dipt., Dryomyzidae);Backlund;K. fysiogr. Sällsk. Förh.,1945b