Tetrahedron Asymmetry, , vol. 7, # 3 p. 657 - 658 Tetrahedron Asymmetry, , vol. 8, # 3 p. 345 - 348 Tetrahedron Asymmetry, , vol. 8, # 14 p. 2473 - 2478 Tetrahedron Asymmetry, , vol. 9, # 10 p. 1817 - 1822