1. G. Mattioda, Y. Christidis, Glyoxylic Acid. Ullmann´s Encyclopedia of Industrial Chemistry, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, 2000, p. 89–92.
2. O. V. Vodyankina, L. N. Kurina, L. A. Petrov, A. S. Knyazev, Glioksal' [Glyoxal], Akademiya, Moscow, 2007, 248 pp. (in Russian).
3. A. N. Kravchenko, V. V. Baranov, G. A. Gazieva, I. E. Chikunov, Yu. V. Nelyubina, Russ. Chem. Bull., 2014, 63, 416.
4. W. T. Black, G. A. Cook, Ind. Eng. Chem. Prod. Res. Dev., 1966, 5, 350.
5. F. Zhao, F. Yan, Y. Qian, Y. Xu, C. Ma, J. Electroanal. Chem., 2013, 698, 31.