1.
Khan Z. R., Ampong - Nyarko K., Chiliswa P., Hassanali A., Kimani S., Lwande W., Overholt W. A., Overholt W. A., Picketta J. A., Smart L. E., Woodcock C. M.: Intercropping increases parasitism of pests. Scientific Correspondence, 1997, Vol. 388, 631-632.