Mitchell, H. K.; Snell, E. E.; Williams, R. J. (1941). "The concentration of "folic acid"". Journal of the American Chemical Society. 63 (8): 2284. doi:10.1021/ja01853a512.
Taylor, Geoffrey (1950). "The formation of a blast wave by a very intense explosion". Proceedings of the Royal Society. A201. London: 159 ff. JSTOR98395. The report was classified when written.