00554naa#a2200181#i#4500001001500000003001700015005001700032011001400049100004100063101000800104102000700112200009600119210005600215215001000271608002700281700002500308856003900333EN\\bibl\12242/en/manage/index20240929223417.7##a1992-5980##a20160621b2016####ek#y0engy0150####ca0#aRUS##aRU1#aSolving eigenvalues problems for Helmholtz equation by point-source methodeJournal article1#arostov on doncDon state technical Universityd2016##a8 с.##aJournal article2local#1aShcherbakovagElena 4#atest.editorum.ruu/en/manage/index