00569naa#a2200181#i#450# EN\\bibl\80719 20241204115800.3 2076-0655 20160325b2016####ek#y0engy0150####ca RUS RU Influence of coal waste on the porosity of heat-insulating materials based on interslate clay Journal article Moscow Individual Entrepreneur Svetlana Vasilievna Samchenko 2016 6 с. Journal article local Abdrakhimova E S Abdrakhimov V Z tsilicates.ru