00554naa#a2200181#i#4500001001500000005001700015011001400032100004100046101000800087102000700095200011300102210008500215215001000300608002700310700000600337700000600343856002300349EN\\bibl\8816420251222221759.1##a2074-8183##a20171225b2017####ek#y0engy0150####ca0#aRUS##aRU1#aTHE PROBLEM OF CLASSIFICATION OF ELECTRONIC LEARNING SYSTEMS AND VARIANTS FOR ITS SOLUTIONSeJournal article1#aVolgogradcVolgograd Academy of the Ministry of Internal Affairs of Russiad2017##a6 с.##aJournal article2local#1g #1g 4#ava-mvd.editorum.ru