Soosalu askja 2007_seismic_project_scientific_report
Grossfeldt engineering qualification
Valgma orcid
Valgma oil shale_oil_production
Valgma possibilities for mitigating negative effects of noise and dust caused by extraction of sand, gravel and peat(2)
Valgma mining blasting
Valgma mining water
Valgma mining waste
Valgma losses
Valgma landscape
Valgma etis
Valgma infiltration dam_groundwater_regime
Valgma estonian oil_shale_resources_calculated_by_gis_method
Valgma cv academic_search
Valgma engineering qualification
Valgma d 2444-2009 - researcher id
Valgma an analysis_of_vegetation_restoration_on_opencast_oil_shale_mines_in_estonia
Valgma backfilling technologies for estonian oil shale mines(2)
Valgma google scholar citations
Pastarus paste-fills-technology-in-condition-of-estonian-oil-shale-mine