- Geomagnetic Reversals from Impacts on the Earth, Richard A. Muller and Donald E. Morris, LBL-20131, (September 1985, revised August 1986), published in Geophysical Research Letters 13, 1177-1180 (1986). The article is summarized in Physics Today, February 1987, pp 17-20.
- Magnetic reversal rate and sea level, R. A. Muller and D. E. Morris, Nature 332, 211 (1988).
- Geomagnetism, Sea Level and Tectonics, a letter in reply, R.A. Muller and D.E. Morris, Physics Today 41, 122 (1988).