K. P.  Bland, ?Some leaf-mining Diptera from North Uist, Outer Hebrides?, Glasgow Naturalist, vol. 22, no. 4, pp. 385-387, 1994.

T. A.  Jefferson, Leatherwood, S., and Webber, M. A., FAO species identification guide. Marine mammals of the world. Rome: United Nations Environment Programme, Food and Agriculture Organization of the United Nations, 1994.