1. Bini C, Bresolin F (1998) Soil acidification by acid rain in forest ecosystems: a case study in northern Italy. Sci Total Environ 222(1–2):1–15
2. Likens GE, Bormann FH, Johnson NM (1972) Acid rain. Environ Sci Pol 14(2):33–40
3. Brady (1984) The nature and properties of soils, 9th edn. London, New York
4. Editorial Committee of Guangdong Province Chorography (1999) Guangdong province chorography (geography). The Guangdong People’s Press, Guangzhou
5. Figuerêdo DV (1999) Influence of calcareous soil particulates on acid rain: Belo Horizonte metropolitan region, Brazil. Ambio 28(6):514–518