1. 1 J ASCARD (1990 ) Weed control in ecological vegetable farming . In:Proceedings Ecological Agriculture, JNF Seminar 166 - Miljovard. Alternative Odling 5. Sveriges Landbruksuniversitet, Sweden, 178-184.
2. Effect of Soil Cover on Weeds
3. A mathematical model to predict Sorghum halepense (L.) Pers. seedling emergence in relation to soil temperature
4. 4 J BOIFFIN, P DUBRULLE, C DURR, and G RICHARD (1994 ) Modelling sugarbeet seedling emergence and early growth . In:Proceedings 13th International ISTRO Conference, Aalborg, Denmark, 1143-1148.
5. 5 WJ CASHMORE, and JC CASELEY (1995 ) Effects of low doses of herbicides, temperature and simulated harrowing on the survival of three weed species . In:Proceedings 1995 Brighton Crop Protection Conference - Weeds, Brighton, United Kingdom, 719-724.