Bott, S., FENG, X., BOTT, S., & LIPPARD, S. (1990). Structure of tetramethyl reductic acid (TMRA, 4,4,5,5-tetramethyl-2,3-dihydroxy-2-cyclopenten-1-one), a reductate ligand involved in dioxygen activation by multinuclear iron complexes. Acta Crystallographica Section C Crystal Structure Communications, 46(9), pp. 1671-1674. doi:10.1107/S0108270189011868

Bott, Simon, XD FENG, SG BOTT, and SJ LIPPARD. "Structure of Tetramethyl Reductic Acid (TMRA, 4,4,5,5-tetramethyl-2,3-dihydroxy-2-cyclopenten-1-one), a Reductate Ligand Involved in Dioxygen Activation By Multinuclear Iron Complexes." Acta Crystallographica Section C Crystal Structure Communications 46, no. 9 (1990): 1671-1674.

Bott, Simon, XD FENG, SG BOTT, and SJ LIPPARD. "Structure of Tetramethyl Reductic Acid (TMRA, 4,4,5,5-tetramethyl-2,3-dihydroxy-2-cyclopenten-1-one), a Reductate Ligand Involved in Dioxygen Activation By Multinuclear Iron Complexes." Acta Crystallographica Section C Crystal Structure Communications 46.9 (1990): 1671-1674.