1. Susceptibility: factors in the plant modifying the response of a given species to treatment;Åberg,1964
2. Bekaempfung resistenter Unkrauter in Mais. Erfahrungen mit mechanischen und chemischen Verfahren;Ammon;Die Gruene,1984
3. Disappearance of herbicides from irrigated soils;Arle;Weeds,1965
4. Modernization of Agriculture in Developing Countries.;Arnon,1987