7Healy P M,Palepu K G,Ruback R S. Does corpo- rate performance improve after mergers? [ J]. Journal of Fi- nancial Economics, 1992 ( 31 ) : 135 - 175.
8Markides C C, Williamson P J. Related diversi- fieation core competences and corporate performance [ J ],Strategic Management Journal, 1994(15) : 149 - 165.
9Hitt M A, King D, Krishnan H, et al. Mergers and acquisitions : overcoming pitfalls, building synergy, and crea- ting value [ J ]. Business Horizons,2009,52 ( 6 ) : 523 - 529.
10Seth A. Value creation in acquisitions: a rexamina- tion of performance [ J ]. Strategic Management Journal, 1990 (11) :99 -115.