00514naa#a2200181#i#450# EN\INFRA-M\bibl\10832 /en/manage/index 20240923231838.1 2308-4898 20160317b2016####ek#y0engy0150####ca ENG RU Roof Skeletons and Graph Theory Trees Journal article Moscow INFRA-M Academic Publishing LLC. 2016 8 с. Journal article local Kozniewski E. test.editorum.ru /en/manage/index