A. I. Elnatanov, N. S. Geintse, I. I. Strizhevskii, “Effects of hydrogen on the critical flame-extinction diameter for ammonia-hydrogen-air mixtures”, Fizika Goreniya i Vzryva, 11:1 (1975), 142–144; Combustion, Explosion and Shock Waves, 11:1 (1975), 124–125
