Taylor, P.L (1977) Eliminating Adjacent-Channel Interference, Wireless World 83(1499), pp55-57. July 1977.
Adiacent-channel interference between amplitude-modulated signals can be overcoffiG, even when the carrier frequencies are so close together that the sideband of one signal overlaps the carrier of the other.

Brook, Trevor (1989) A.M. Synchronous Demodulator, Electronics & Wireless World 95(1643), pp858-60. September 1989.
Used with an existing short-wave AM receiver, this demodulator by Trevor Brook of Surrey Electronics provides SSB, LSB, envelope, DSB and quadrature detection to reduce the effects of poor S:N ratios

Illingworth, Lewis (1981) A.M. Receivers Without Interference, Wireless World 87(1549), pp79-83. October 1981.
Two systems which work with d.s.b. amplitude modulated carriers are described. As the slgnals are those propagated in long, medium and short wave bands throughout the world, there is a universal application, The systems make use of the fact that a.m. signals have symmetrical sidebands spreading out each side of the carrier frequency so that a modulated carrier has a constant phase, that of the carrier. Interference is not symmetrical even when it spreads through the same frequencies and this asymmetry can be used against it.