Environmental impact of mine blastingTomberg, Tõnu; Toomik, ArviProceedings of the 2nd International Conference "Environment. Technology. Resources" : Rezekne, Latvia, 25-27 June 19991999 / p. 213-219

Mapping potential areas of ground subsidence in Estonian underground oil shale mining districtValgma, IngoProceedings of the 2nd International Conference "Environment. Technology. Resources" : Rezekne, Latvia, 25-27 June 19991999 / p. 227-232 : ill

Toompea Hill stability and Tallinn area subsidencePastarus, Jüri-RivaldoProceedings of the 2nd International Conference "Environment. Technology. Resources" : Rezekne, Latvia, 25-27 June 19991999 / p. 136-141

Десять лет платного природопользования в ЭстонииReinsalu, EnnoProceedings of the 2nd International Conference "Environment. Technology. Resources" : Rezekne, Latvia, 25-27 June 19991999 / p. 152-155