1) Lee, J.-S., & Jang, S. (Shawn). (2007). The systematic-risk determinants of the US airline industry. Tourism Management, 28(2), 434–442.
2) Kavussanos, M. G., & Marcoulis, S. N. (1998). Beta comparisons across industries—a Water transportation industry perspective. Maritime Policy & Management, 25(2), 175–184.
3) Dr.Prameela S. Shetty,Dr.Devaraj K, Risk and Return Analysis of Pharmaceutical Industry Volume 1, Issue 1 , September 2017, ISSN 2456 - 9151 36.
4) www.nseindia.com
5) Ragunathan, V., Faff, R. W., & Brooks, R. D. (2000). Australian industry beta risk, the choice of market index and business cycles. Applied Financial Economics, 10(1), 49–58.
6) Mergner, S., & Bulla, J. (2008). Time-varying beta risk of Pan-European industry portfolios: A comparison of alternative modeling techniques. The European Journal of Finance, 14(8), 771–802.