Cadogan, J. I. G.; Hickson, Clare L.; Husband, James B.; McNab, Hamish
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1985 , p. 1891 - 1896

Zhou, Jing; Huang, Liang-Zhu; Li, You-Qiang; Du, Zhen-Ting
Tetrahedron Letters, 2012 , vol. 53, # 52 p. 7036 - 7039