00507naa#a2200169#i#4500001002100000005001700021011001400038100004100052101000800093102000700101200010700108210005100215215001000266608002700276700001900303856001500322EN\INFRA-M\bibl\671220240821171158.3##a1998-0701##a20131017b2013####ek#y0engy0150####ca0#aRUS##aRU1#aProfitability marginal profit in the system marginal analysis of the economic subjecteJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2013##a3 с.##aJournal article2local#1aSmirnovagYu. 4#anaukaru.ru