4Bartlett K. Towards a true community of scholars: undergraduate re- search in the modem university[ J]. Journal of Molecular Structure - Theochem,2003, 666:707-711.
5Cai Z S, Jensen D L, Christensen T H,Bager D H. Re -use of sta- bilised flue gas ashes from solid waste incineration in cement - treated base layers for pavements[Jl. Waste Management & Research, 2003, 21(1) :42 -53.