1. Fractional composition of cyclonic ash from powdered fuel combustion furnaces;Kikas,1955
2. Influence of combustion conditions on properties of oil shale binder;Kikas,1995
3. Influence of temperature on the rate of hardening of oil shale ash binder;Kikas,1955
4. Mineral composition of cyclonic ash from powdered oil shale combustion, and of its fractions;Piksarv,1995
5. Some factors determining the quality of autoclaved oil shale ash products;Otsman,1959