Response Surface Methodology (RSM) approach to formulate and optimize the bilayer combination tablet of Tamsulosin and Finasteride oleh Muneeba Akhtar, Muhammad Zaman, Ahsan Zamir Siddiqi, Hasan Ali, Rahima Khan, Muhammad Nadeem Alvi, Muhammad Hammad Butt, Fatma M. El-Demerdash, Dalal Nasser Binjawhar, Amany A. Sayed, Ahmed E. Altyar, Mohamed M. Abdel-Daim