γ

Pop et al. (2004) [29]

Sharma (2009) [26]

Hayat et al. (2014) [30]

Present results

0.1

−0.9694

−0.969386

−0.9679

−0.9694

0.2

−0.9181

−0.9181069

−0.9172

−0.9181

0.5

−0.6673

−0.667263

−0.6670

−0.6673

2.0

2.0174

2.01749079

2.0174

2.0175

3.0

4.7293

4.72922695

4.7294

4.7293