1. Ben Saad, A.A., Bishop, G.W. — 1972. The use of food sprays to augment the natural enemies of potato insects. —Abstract 14th Int. Congr. Entomol., 214.
2. Ben Saad, A.A., Bishop, G.W. — 1974. Effect of artificial honeydews on numbers of insects in potato fields. — (in press: to be published in University of Idaho, Dept. Entomol. Golden Jubilee Volume.)
3. Colburn, R. &Asquith, D. — 1970. A cage used to study the finding of a host by the ladybird beetle,Stethorus punctum. —J. Econ. Entomol., 63, 1376–7.
4. Davidson, W.M. — 1923. Biology ofScymnus nubes Casey [Coleoptera: Coccinellidae]. —Trans. In. Entomol. Soc., 49, 155–63.
5. Ewart, W.H. &Metcalf, R.L. — 1956. Preliminary studies of sugar and amino acids in the honeydews of five species of coccids feeding on citrus in California. —Ann. Entomol. Soc. Am., 49, 441–7.