1. 1. Qasem JR, Foy CL (2001) Weed allelopathy, its ecological impact and future prospects. In, Allelopathy in Agroecosystem, Journal of Crop Production 4: 43 -119. Link: https://goo.gl/DZaZd5
2. 2. Willis RJ (2007) The History of Allelopathy. Springer: 3, retrieved 2009-08-12. Link: https://goo.gl/PzC2Wg
3. 3. Qasem JR (2011) Matthiola arabica Boiss.: Is it an allelopathic weed?. In: Proceedings of the 6th World Congress on Allelopathy-From Theory to Practice, Shiming Luo, Rensen Zeng, Yuanyuan Song and Xiaoting Liang (Eds.).Pages 96-111, December 15-19, 2011, South China Agricultural University, Guangzhou, China. Link: https://goo.gl/AC9Yi3
4. 4. Pratley JE, An M, Haig T (1996) Following a specific protocol establish allelopathy conclusively - an Australian case study. In, Allelopathy, a Sscience for the Future. Vol.1. (Eds. F.A. Macias, J.C.G. Galindo, J.M.G. Molinillo and H.G. Gutler), 63-70.
5. 5. Qasem JR, Hill TA (1989) On difficulties with allelopathy methodology. Weed Research 29: 345-347. Link: https://goo.gl/zjvkyV