1. Goth, J. W. Engnng Min. J. 180, 122 & 129 (1979).
2. Mosby, J. F., Hoekstra, G. B., Kleinhenz, T. A. & Sroka, J. M. Hydrocarbon Proc. 52, 93–97 (1973).
3. Holloway, P. H., Granoff, B., Nowak, F. J., Mellendore, A. W. & Lieberman, M. L. 1st A. Rep. Chem. Studies on SYNTHOIL Process (Sandia Laboratories, Albuquerque, New Mexico, 1976).
4. Stanulonis, J. J., Gates, B. C. & Olson, J. H. A.I.ChE. J. 22, 576–581 (1976).
5. Internal Quarterly Technical Progress Rep., July-September 1977 (Pittsburgh Energy Technology Center, Pennsylvania, 1977).