W.  Héllen, ?Ichneumoniden aus Nematus (Pteronidea) cognatus Lqv. (Hym., Tenthr.) gezüchtet.?, Notulae Entomologicae, vol. 41, p. 138, 1961.

W.  Héllen, ?[Empria alpina Bens., new for Finlands fauna]?, Notulae Entomologicae, vol. 40, p. 153, 1961.

W.  Héllen, ?Mitteilungen über einige Tenthredinoiden Finnlands III.?, Notulae Entomologicae, vol. 40, pp. 109-111, 1961.

W.  Héllen, ?Ichneumoniden aus Nematus (Pteronidea) cognatus Lqv. (Hym., Tenthr.) gezüchtet.?, Notulae Entomologicae, vol. 41, p. 138, 1961.

W.  Héllen, ?En för faunan ny parasitstekel, Mesocuorus pictilis Holmgr.?, Notulae Entomologicae, vol. 41, p. 103, 1961.

W.  Héllen, ?Zur Ichneumonidenfauna Finnlands (Hym.). X.?, Notulae Entomologicae, vol. 41, pp. 88-101, 1961.

W.  Héllen, ?Lathrostizus sternocerus Thoms. (Hym., Ichn.) in Finnland wiedergefunden.?, Notulae Entomologicae, vol. 41, p. 79, 1961.

W.  Héllen, ?Ichneumonidenfunde aus Madeira?, Notulae Entomologicae, vol. 41, pp. 35-38, 1961.