Rettig, Michael F.; Wing, Richard M. X-ray crystallographic, chemical, and spectroscopic studies of the palladium dichloride complexes of cyclonona-1,5-diene, cycloocta-1,5-diene, cycloocta-1,4-diene, and cyclohepta-1,4-diene. Journal of the American Chemical Society. June 1981, 103 (11): 2980–2986. doi:10.1021/ja00401a012.