00461naa#a2200169#i#4500001002200000005001700022011001400039100004100053101000800094102000700102200005900109210005100168215001000219608002700229700002000256856001500276EN\INFRA-M\bibl\1083220241218175108.3##a2308-4898##a20160317b2016####ek#y0engy0150####ca0#aENG##aRU1#aRoof Skeletons and Graph Theory TreeseJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2016##a8 с.##aJournal article2local#1aKozniewskigE. 4#anaukaru.ru