00510naa#a2200181#i#450# EN\\bibl\80794 20241212001403.4 2076-0655 20180625b2018####ek#y0engy0150####ca RUS RU Volume periodic matrix of chemical elements Journal article Moscow Individual Entrepreneur Svetlana Vasilievna Samchenko 2018 4 с. Journal article local Gusev B V Speransky A A tsilicates.ru