Nilsen, Nils O.; Skattebol, Lars; Baird, Mark S.; Buxton, Sheila R.; Slowey, Paul D.
Tetrahedron Letters, 1984 , vol. 25, # 27 p. 2887 - 2890

Sydnes, Leiv K.; Alnes, Karl F. S.; Pettersen, Anita; Brinker, Udo H.
Monatshefte fur Chemie, 2009 , vol. 140, # 5 p. 479 - 483