3Fekrat, Inclan C, Petroni D.Corporate environmental disclosure: competitive disclosure hypothesis using 1991 annual report data[J].The international Journal of accounting, 1996, ( 1 ) : 175-195.
4Dennis MPatterrMedia exposure, public policy pressure, and environmental disclosure: an examination of the impact oftri data availability[J[ Accounting Forum, 2002, (6) : 152-171.