M. J.  Sarasua, Moret, J., Palou, L., and Avilla, J., ?Compartamiento de alimentacion sobre el huesped del autoparasitoide facultativo Encarsia tricolor Foerster (Hymenoptera, Aphelinidae)?, Boletín de Sanidad Vegetal Plagas, vol. 16, p. 427, 1990.

M. J.  Sarasua, Pifarre, M. D., and Avilla, J., ?Evaluacion de la inferencia mutua en la autoparasitoide facultativo Encarsia tricolor (Hymenoptera, Aphelinidae)?, Boletín de Sanidad Vegetal Plagas, vol. 16, p. 427, 1990.

J.  Avilla, Anadon, J., and Sarasua, M. J., ?Fecundidad y proporcion de sexos de la descendencia de hembras del autoparasitoide facultativo Encarsia tricolor a differentes densidades reletivas del huesped primario?, Boletín de Sanidad Vegetal Plagas, vol. 16, p. 428, 1990.

J.  Avilla, Anadon, J., Sarasua, M. J., and Albajes, R., ?Egg allocation of the autoparasitoid Encarsia tricolor at different relative densities of the primary host ( Trialeurodes vaporariorum ) and two secondary hosts ( Encarsia formosa?, Entomologia Experimentalis et Applicata, vol. 59, pp. 219-227, 1991.

J.  Avilla, Artigues, M., Sarasua, M. J., and Albajes, R., ?A review of the biological characteristics of Encarsia tricolor and their implications for biological control?, Bulletin. Section Regionale Ouest Palaearctique, Organisation Internationale de Lutte Biologique., vol. 13, pp. 14-18, 1990.

J.  Avilla and , ?Toxidad de ciromacina sobre el parasitoide Encarsia tricolor Förster (Hymenoptera, Aphelinidae)?, Boletín de Sanidad Vegetal Plagas, vol. 16, pp. 419-424, 1990.

J.  Avilla and Copland, M. J. W., ?Effects of host stage on the development of the facultative autoparasitoid Encarsia tricolor (Hymenoptera; Aphelindiae)?, Annals of Applied Biology, vol. 110, pp. 381-389, 1987.

J.  Avilla and Copland, M. J. W., ?Development rate, number of mature oocytes at emergence and adult size of Encarsia tricolor at constant and variable temperatures?, Entomophaga, vol. 33, pp. 289-298, 1988.

J.  Avilla, Viggiani, G., Diaz, X., and Sarasua, M. J., ?Morphological and biological notes on Encarsia meritoria Gahan (Hymenoptera, Aphelinidae), a parasitoid of Trialeurodes vaporariorum (Westwood) (Homoptera, Aleyrodidae) new in Europe?, Biocontrol Science and Technology, vol. 1, pp. 289-295, 1991.

M.  Artigues, Avilla, J., Sarasua, M. J., and Albajes, R., ?Primary host discrimination and elimination of supernumeraries in the facultative autoparasitoid Encarsia tricolor (Hymenoptera: Aphelinidae)?, Entomologia Generalis, vol. 17, pp. 131-138, 1992.

M.  Artigues, Avilla, J., Sarasua, M. J., and Albajes, R., ?Egg laying and host stage preference at constant temperatures in Encarsia tricolor ?, Entomophaga, vol. 37, pp. 45-54, 1992.