References
- Hille Ris Lambers , D. 1939 . On some Western European aphids . Zool. Meded., Leiden. , 22 : 79 – 119 .
- Ossiannilsson , F. 1959 . Contribution to the knowledge of Swedish Aphids I. Description of some apparently undescribed forms . K. LantbrHogsk. Ann., Uppsala. , 25 : 1 – 46 . 24 figs