1. Belg. Pat. 837628 (H. Kölbel, K.-D. Tillmetz, 1975), H. Kölbel, M. Ralek, K.-D. Tillmetz, Proc. 13th Intersoc. Energy Conv. Conf., Soc. Automat. Eng., San Diego 1978, p. 482
2. Advances in Fischer-Tropsch chemistry
3. V.U.S. Rao, R.J. Gormley, Hydrocarbon Processing, November 1980, p. 139