1. Test of a Commercially Available Heat Pump Water Heater;Mulligan,1984
2. Effectiveness of Heat Pump Desuperheaters in Producing Domestic Hot Water;Mulligan,1984
3. Mulligan, J.C., Edwards, J. A., and Johnson, R. R. (1985). Performance Tests of Heat Pump Systems. Proceedings of the ASHRAE/REHVA World Congress on Heating, Ventilating and Air-Conditioning. CLIMA 2000, Copenhagen, Denmark, Vol. 6, pp. 135–140.