Rose, Phillip D. R.; Williams, Andrew
Journal of the Chemical Society, Perkin Transactions 2, 2002 , # 9 p. 1589 - 1595

Azzena, Ugo; Dettori, Giovanna; Sforazzini, Giuseppe; Yus, Miguel; Foubelo, Francisco
Tetrahedron, 2006 , vol. 62, # 7 p. 1557 - 1563