00501naa#a2200169#i#4500001001500000005001700015011001400032100004100046101000800087102000700095200009600102210005600198215001000254608002700264700002500291856001500316EN\\bibl\1224220241019075710.6##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#anaukaru.ru