F. B.  Pyatt, Gilmore, G., Grattan, J. P., Hunt, C. O., and McLaren, S., ?An imperial legacy? An exploration of the environmental impact of ancient metal mining and smelting in southern Jordan?, Journal of Archaeological Science, vol. 27, pp. 771-778, 2000.

G. A. R. Y.  BROWN and POREMBSKI, S. T. E. F. A. N., ?Phytogenic hillocks and blow-outs as ?safe sites? for plants in an oil-contaminated area of northern Kuwait?, Environmental Conservation, vol. 27, pp. 242 - 249, 2000.

V.  Kaul, Koul, A. K., and Sharma, M. C., ?The underground flower?, Current Science, vol. 78, pp. 39-44, 2000.

S.  Lev-Yadun, ?Why are underground flowering and fruiting more common in Israel than anywhere else in the world??, Current Science, vol. 79, 2000.