7Blauert J. Spatial hearing. MIT Press, Cambridge, MA,1983.
8Nakabayashi K. A Method of analyzing the quadraphonic sound field. J Audio. Eng. Soc., 1975; 23(3): 187-193.
9Kirkeby O. The stereo dipole-a virtual source imaging system using two closely spaced loudspeakers. J Audio.Eng. Soc., 1998; 46(5): 387-395.
10Leakey D M. Some measurement on the effect of interchannel intensity and time difference in two channel soundsystem. J Acoust. Soc. Am., 1959; 31(7): 977-986.