1. Canada Department of Agriculture, 1956: Annual Report of the Forest Insect and Disease Survey, Ottawa, S. 14.
2. Canada Department of Agriculture, 1957: Annual Report of the Forest Insect and Disease Survey, Ottawa, S. 12, 46.
3. Barnes, H. F., 1951: Gall Midges of economic Importance Vol. V. Trees. Grosby Lockwood London, S. 70–71.
4. Escherich, K., 1937: Die Zweiflügler des Waldes. Fw. Chl.59, 401–449.
5. Escherich, K., 1942: Die Forstinsekten Mitteleuropas. V. Bd. P. Parey, Berlin, S. 571–572.