Khan, Mehtab <br/><br/>
Energy of digraphs and signed digraphs/ 
Mehtab Khan 
 - Islamabad :  SNS - NUST,  2017. 
 - viii, 97 p. : ill. ;   30cm. 
<br/><br/><label>Subjects--Topical Terms: </label>--PhD-Mathematics
<br/><br/><label>Dewey Class. No.: </label>200