C. E. Housecroft and E. C. Constable, “Ditopic and Tetratopic 4,2’:6’,4’’-Terpyridines as Structural Motifs in 2D- and 3D-Coordination Assemblies”, Chimia, vol. 73, no. 6, pp. 462–467, Jul. 2019, doi: 10.2533/chimia.2019.462.