Highly Strained, Ring-Tilted [1]Ferrocenophanes Containing Group 16 Elements in the Bridge: Synthesis, Structures, and Ring-Opening Oligomerization and Polymerization of [1]Thia- and [1]SelenaferrocenophanesRon Rulkens, Ian Manners, David Balaishis et al.|Journal of the American Chemical Society|1997Cited by 123