• Fine aggregates produced from oil shale mining waste rock for backfilling the mined areasTohver, TarmoПроблемы недропользования / Санкт-Петербургский Государственный Горный Институт2010 / 1, с. 104-106 https://www.researchgate.net/publication/235941653_Fine_aggregates_produced_from_oil_shale_mining_waste_rock_for_backfilling_the_mined_areas