Journal of Mathematical Inequalities · Volume 9, Issue 3 On the extremal energy of bicyclic digraphs 09-66 Pages 799-810 DOI 10.7153/jmi-09-66 Downloads Short PDF Full PDF PNG Authors Mehtab Khan Rashid Farooq Azad A. Siddiqui Keywords energy of digraphs bicyclic digraphs Subject classes 05C35 05C50