Sroysang, Banyat, Department of Mathematics and Statistics, Faculty of Science and Technology, Thammasat University, Pathumthani 12121, Thailand

• Communications in Mathematics and Applications Vol. 4 No. 2 (2013) - Research Article
  Four Inequalities for the Exponential Integral Functions
  Abstract  PDF
• Communications in Mathematics and Applications Vol. 4 No. 2 (2013) - Research Article
  On the $n$-th Derivative of the Exponential Integral Functions
  Abstract  PDF
• Communications in Mathematics and Applications Vol. 4 No. 2 (2013) - Research Article
  Inequalities for the Incomplete Exponential Integral Functions
  Abstract  PDF