- Pena, A., M. Campos, and A. Sanchez-Raya. 1998. New device for ethylene release in pest management . Journal of Agricultural Entomology 15:9-21.
- Pena, A., C. Lozano, A. J. Sanchez-Raya, and M. Campos. 1998. Ethylene release under field conditions for the management of the olive bark beetle, Phloeotribus scarabaeoides . Journal of Agricultural Entomology 15:23-32.