Zincke Nitration.
T. Zincke, J. Prakt. Chem. 61, 561 (1900)
L. C. Raiford and W. Heyl, Am. Chem. J. 43, 393 (1910); 44, 209
(1911)
H. H. Hodgson and J. Nixon, J.Chem. Soc. 1932, 273
L. C. Raiford and G. R. Miller, J. Am. Chem. Soc. 55, 2125 (1933)
L. C. Raiford and A. L. LeRosen, ibid. 66, 1872 (1944).