M.  Viitasaari, ?The Northern European taxa of Pamphiliidae (Hymenoptera)?, in Sawflies I. a review of the suborder, the Western Palaearctic taxa of Xyeloidea and Pamphilioidea, 2002, pp. 235-358.

M.  Viitasaari, ?A review of extant families of the Hymenoptera, Symphyta?, in Sawflies I. a review of the suborder, the Western Palaearctic taxa of Xyeloidea and Pamphilioidea, Tremex Press, 2002, pp. 175-195.

M.  Viitasaari, ?The Suborder Symphyta of Hymenoptera?, in Sawflies I. a review of the suborder, the Western Palaearctic taxa of Xyeloidea and Pamphilioidea, Tremex Press, 2002, pp. 12-174.

M.  Viitasaari, Sawflies I.  a review of the suborder, the Western Palaearctic taxa of Xyeloidea and Pamphilioidea. Tremex Press, 2002.