Woodward, R. B.; Cava, Michael P.; Ollis, W. D.; Hunger, A.; Daeniker, H. U.; Schenker, K. THE TOTAL SYNTHESIS OF STRYCHNINE. Journal of the American Chemical Society (American Chemical Society (ACS)). 1954, 76 (18): 4749–4751. ISSN 0002-7863. doi:10.1021/ja01647a088.
Woodward, R. B.; Cava, Michael P.; Ollis, W. D.; Hunger, A.; Daeniker, H. U.; Schenker, K. THE TOTAL SYNTHESIS OF STRYCHNINE. Journal of the American Chemical Society (American Chemical Society (ACS)). 1954, 76 (18): 4749–4751. ISSN 0002-7863. doi:10.1021/ja01647a088.