00466naa#a2200157#i#450# EN\\bibl\47165 20260314005214.6 1681-1208 20010825b2001####ek#y0engy0150####ca RU A mathematical model of the crustal waveguide Journal article Moscow Geophysical Center of the Russian Academy of Sciences 2001 14 с. Journal article local Karakin A V ras.editorum.ru