Теорија графова — разлика између измена

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* {{Cite book | ref = harv | last=Mahadev |first=N. V. R. |last2=Peled |first2=Uri N. | year=1995 |title=Threshold Graphs and Related Topics |url= |location= |publisher=[[North-Holland Publishing Company|North-Holland]] |page= |id=ISBN |author-link= }}