Sikandar Hayat , Bilal Idress, Dr. Jawad Karamat, Naseer Muhammad, Muhammad Subhan, Dr.Arshad Iqbal, “Systematic And Un-Systematic Factors Influencing Profitability In The Energy Sector Of Pakistan”, Migrat. Lett., vol. 21, no. S11, pp. 72–83, Jun. 2024.