1. Berkowitz, N. (1960). Prepr. Blast Furnace, Coke Oven, Raw Mater. Conf., AIME pp. 1–18.
2. Berkowitz, N. (1967). Proc. Symp. Sci. Tech. Coal, 1967 pp. 149–155.
3. Berkowitz, N. (1979). Proc. Robert A. Welch Found. Conf. Chem. Res. 22.
4. Behaviour differences between Carboniferous and Cretaceous bituminous coals of similar rank