Aggarwal VK, Emme I, Fulford SY (February 2003). "Correlation between pK(a) and reactivity of quinuclidine-based catalysts in the Baylis-Hillman reaction: discovery of quinuclidine as optimum catalyst leading to substantial enhancement of scope". The Journal of Organic Chemistry. 68 (3): 692–700. doi:10.1021/jo026671s. PMID12558387.
Aggarwal VK, Emme I, Fulford SY (February 2003). "Correlation between pK(a) and reactivity of quinuclidine-based catalysts in the Baylis-Hillman reaction: discovery of quinuclidine as optimum catalyst leading to substantial enhancement of scope". The Journal of Organic Chemistry. 68 (3): 692–700. doi:10.1021/jo026671s. PMID12558387.