P.  Barnard, Identifying British insects and arachnids: an annotated bibliography of key works. Cambridge University Press, 1999, p. 368.

J. S.  Noyes, ?Hymenoptera: the bees, wasps and ants?, in Identifying British insects and arachnids: an annotated bibliography of key works, Cambridge: Cambridge University Press, 1999, pp. 196-319.