1. Beg S, Swain S, Rahman M, Hasnain MS, Imam SS (2019) Chapter 3 - Application of design of experiments (DoE) in pharmaceutical product and process optimization. In: Beg S, Hasnain MS (eds) Pharmaceutical quality by design. Academic Press, New York, pp 43–64
2. Singh B, Raza K, Beg S (2013) Developing “optimized” drug products employing “designed” experiments. Chem Ind Dig 23:70–76
3. Beg S, Rahman M, Robaian MA, Alruwaili NK, Imam SS, Panda SK (2020) Pharmaceutical drug product development and process optimization: effective use of quality by design. CRC Press, New York
4. Singh B, Beg S (2013) Quality by design in product development life cycle. Chron Pharmabiz 22:72–79
5. Beg S, Hasnain MS, Rahman M, Swain S (2019) Chapter 1 - Introduction to quality by design (QbD): fundamentals, principles, and applications. In: Beg S, Hasnain MS (eds) Pharmaceutical quality by design. Academic Press, New York, pp 1–17