1991 22 november 2017 Keulen, W. van, Possible Mechanism for Explaining Monaural Phase Effects, in 90th AES Convention. 1991: Paris. Keulen, W. van, F.A. Bilsen, and J. Raatgever, Interaural Intensity and Time Images Revisited, in 17th DAGA. 1991: Bochum.