Bischler Triazine Synthesis
A. Bischier Ber. 22 2801 (1889)
A. Bischler and S. Brodsky, Ber. 22, 2809 (1889)
A. Hempel, J. Prakt. Chem. 41, 161(1890)
R. R. Abramovitch and K. Schofield, J. Chem. Soc. 1955, 2326
Also see Bamberger Triazine Synthesis