Smith, ., M, E., Shapiro, ., L, E., Teutsch, ., G, ., … Wong, P.-S. (1974). Thermal and Photolytic Rearrangement of 4-Azido-Δ4,6-3-ketosteroids to 5β-Cyano-A-Nor-Δ6-3-ketosteroids. Tetrahedron Letters, 3519–3522.

Smith, R. A., E. M, E. Shapiro, E. L, E. Teutsch, E. G, E. Weber, et al. “Thermal and Photolytic Rearrangement of 4-Azido-Δ4,6-3-ketosteroids to 5β-Cyano-A-Nor-Δ6-3-ketosteroids.” Tetrahedron Letters, 1974, 3519–22.

Smith, M E, Shapiro, L E, Teutsch, G, et al. Thermal and Photolytic Rearrangement of 4-Azido-Δ4,6-3-ketosteroids to 5β-Cyano-A-Nor-Δ6-3-ketosteroids. Tetrahedron Letters. 1974;3519–22.

Smith, R. A., et al. “Thermal and Photolytic Rearrangement of 4-Azido-Δ4,6-3-ketosteroids to 5β-Cyano-A-Nor-Δ6-3-ketosteroids.” Tetrahedron Letters, 1974, pp. 3519–22.

Smith, M E, Shapiro, L E, Teutsch, G, Weber, L, Herzog, L H, Meinwald, J, McPhail, T A, Tschang, Wong P-S. Thermal and Photolytic Rearrangement of 4-Azido-Δ4,6-3-ketosteroids to 5β-Cyano-A-Nor-Δ6-3-ketosteroids. Tetrahedron Letters. 1974;3519–3522.