3Ng A, Donker H. Purchasing reserves and commodity market timing as takeover motives in the oil and gas industry[J]. En- ergy Economics, 2013, 37(2) : 167 - 181.
4Delong G L. Does long - term performance of mergers match market expectations? Evidence from the US banking industry [J]. Financial Management, 2003, 32 (2) : 5 - 25.
5Servaes H. Tobin' s Q and the gains from takeover[J]. Journal of Finance, 1991, 46(3) : 409 -419.