Incorporating global and inter-disciplinary elements into physical geography

Clifford NJ (2009) Globalization: a physical geography perspective. Progress in Physical Geography 33: 5–16.

Stoddart DR (1986) On Geography. Oxford: Basil Blackwell Ltd.

Zhang DD Lee HF Wang C . (2011) The causality analysis of climate change and large-scale human crisis. Proceedings of the National Academy of Sciences of the United States of America 108: 17,296–17,301.