00584naa#a2200181#i#450# EN\\bibl\46848 20240429124652.1 1681-1208 20171025b2017####ek#y0engy0150####ca RU Improving the system of numerical simulation of volcanic ash propagation using the PUFF model Journal article Moscow Geophysical Center of the Russian Academy of Sciences 2017 5 с. Journal article local Malkovsky Sergey I Sorokin Aleksei A Korolev Sergey P rjes.ru