1. Hoshino, Y.: Pharmaceutical market changes and acquisitions in Japanese pharmaceutical companies: the impact on voluntary adoption of IFRS. Kanagawa Univ. Int. Manage Rev. 59, 13–30 (2020)
2. Miyazaki, H.: M&A or R&D?: An analysis of growth-strategy in the pharmaceutical industry, Iryo to syakai, 15, 51–60 (2005)
3. Harada, T., Miyoshi, H.: The pitfalls of M&A: Efficiency versus innovation probability. J. Econ. Bus Adm. 210(3), 21–34 (2014)
4. Miyama, Y., Wakabayashi, H.: What is the new truth about M&A revealed by analyzing 15 years of data. Nenzi Gakuzyutsu Taikai Koen Yoshishu 36, 691–694 (2021)
5. Hattori, T.: Research on Diversification of Technology of Japanese Companies Using Patent Data, Nenzi Gakuzyutsu Taikai Koen Yoshishu (in Japanese) 22, 680–683 (2007)