M.  Viitasaari, Heidemaa, N., Nuorteva, M., and Zinovjev, A., ?An annotated checklist of the sawflies (Hymenoptera, Symphyta) of Estoni?, Proceedings of the Estonian Academy of Sciences. Biology. Ecology, vol. 47, pp. 126-147, 1998.

N.  Heidemaa and Viitasaari, M., ?Parna reseri, a new leaf miner for the fauna of northern Europe (Hymenoptera, Tenthredinidae)?, Proceedings of the Estonian Academy of Sciences. Biology. Ecology , vol. 46, pp. 191-192, 1997.