Citation: Christopher J. Adams; M. Carmen Mu\~noz; Rachel E. Waddington; Jos\'e Antonio Real (2011). Cooperative Spin Transition in the Two-Dimensional Coordination Polymer [Fe(4,4'-bipyridine)2(NCX)2].4CHCl3 (X = S, Se). Inorganic Chemistry, 50, pp. 10633-10642.