N. Guicher, H. Stoeckli-Evans, and K. Bernauer, “Non-Linear Effects in Asymmetric Reactions: Negative and Positive Stereoselectivity in the Formation of Homoleptic 1:2 Metal to Ligand Complexes of Chiral 1,9-Disubstituted Semicorrin Ligands”, Chimia, vol. 57, no. 10, p. 581, Oct. 2003.