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Hilt, Gerhard; Smolko, Konstantin I.; Lotsch, Bettina V. . (2002). Cobalt(I)-catalyzed Neutral Diels-Alder Reactions of Oxygen-functionalized Acyclic 1,3-Dienes with Alkynes. Synlett, 2002(7), 1081–1084. doi:10.1055/s-2002-32592 
10.1055/s-2002-32592