Heim S, Künkel A, Thauer RK, Hedderich R (April 1998). “Thiol:fumarate reductase (Tfr) from Methanobacterium thermoautotrophicum—identification of the catalytic sites for fumarate reduction and thiol oxidation”. 《Eur. J. Biochem.》 253 (1): 292–9. doi:10.1046/j.1432-1327.1998.2530292.x. PMID9578488.
Heim S, Künkel A, Thauer RK, Hedderich R (April 1998). “Thiol:fumarate reductase (Tfr) from Methanobacterium thermoautotrophicum—identification of the catalytic sites for fumarate reduction and thiol oxidation”. 《Eur. J. Biochem.》 253 (1): 292–9. doi:10.1046/j.1432-1327.1998.2530292.x. PMID9578488.