1. Hedgerows and their role in agricultural landscapes;F Burel;Critical Reviews in Plant Sciences,1996
2. Agroforestry practice and policy in the United States of America;HE Gene Garrett;Forest Ecology and Management,1997
3. Li W, Lai S (1994) Agroforestry in China. Beijing: Chinese Science Press. pp. 14–18.
4. Zhu Q, Zhu J (2003) Sustainable management technology for conversion of cropland to forest in loess area. Beijing:Chinese Forestry Press. pp. 160–165.
5. Ong CK, Huxley P (1996) Tree-crop interactions: a physiological approach. Wallingford:CAB International. pp. 386.