00689naa#a2200193#i#4500001002200000005001700022011001400039100004100053101000800094102000700102200012700109210005100236215001000287608002700297675010500324700003200429700002000461856001400481EN\INFRA-M\bibl\1844420250216164722.7##a1998-071X##a20170625b2017####ek#y0engy0150####ca0#aRUS##aRU1#aUsed in Acoustic Projects Calculation of Reflection Coefficient for End Opening of Channel without FlangeeJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2017##a7 с.##aJournal article2local##aОбщие вопросы математических и естественных наук. 50zRUS#1aTupovgVladimir Viktorovich#1aMironovagA. N.4#azh-szf.ru