Dai, F.C., Lee, C.F., Li, J., and Xu, Z.W. (2001) Assessment of land-slide susceptibility on the natural terrain of Lantau Island, Hong Kong. Environ. Geol. 40: 381-391.
Friedman, S.K., Reich, P.B., and Frelich, L.E. (2001) Multiple scale composition and spatial distribution patterns of the north-eastern Minnesota presettlement forest. J. Ecol. 89: 538-554.